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      id="t_6_aab181a6_db29_43f4_a52a_9c0713902c15">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000006484Member"
      id="t_4_dd78ff5e_bf8d_49f1_98ab_7eccf0e4c18e">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
</oef:MaterialFundChngNoticeTextBlock>
    <oef:ExpensesTextBlock
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      id="t_7_666dd39e_ba16_4568_b0d9_aea4d776cd85">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;107&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000006484Member"
      decimals="INF"
      id="h_1_d8e3c8fa_a8f1_4cdd_a5c5_e3c71717f908"
      unitRef="USD">107</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006484Member"
      decimals="4"
      id="h_2_ef096918_5f70_441d_9160_7bd455962a07"
      unitRef="pure">0.0103</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000006484Member"
      id="t_8_adcd378f_8489_4254_9073_0a95a04c9a13">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class A shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.85&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006484Member"
      id="t_9_1211eb96_2cf6_4cde_91d1_b0c6736fe086">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class A over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. This graph includes the deduction of the maximum applicable sales charge.&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2285875.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006484Member"
      id="t_321_0de16abf_9830_4bf8_a04f_b6eda844da30">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006484Member"
      id="t_322_c6c71441_7ed5_4380_b9fe_95bb125eb136">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006484Member"
      id="t_10_4ef86a5c_be0f_4d24_a9ac_6055c6aef989">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;A without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.21&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.65&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;A with initial sales charge (4.25%)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.31&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.20&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_6_f5d02476_e40e_4955_8f13_f2983e9bb79e"
      unitRef="pure">0.0327</oef:AvgAnnlRtrPct>
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      id="h_7_4cb5fe53_6924_4dc3_bf18_18896b877456"
      unitRef="pure">0.0331</oef:AvgAnnlRtrPct>
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      id="h_8_86af098a_a4d8_47b1_85c2_18ac6c45371f"
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      unitRef="pure">0.0856</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_10_5b620f42_a2d8_4257_9e66_5b674a3e5439"
      unitRef="pure">-0.0179</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_11_4d3741d3_da75_4f8e_a5e5_1c67f9556e4f"
      unitRef="pure">0.0127</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.0791</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_13_cbd20cf3_a1e8_4c9f_9df4_93be3b805b7f"
      unitRef="pure">0.0419</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/a&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000006484Member"
      decimals="INF"
      id="h_15_6129582c_22a8_405b_8cd8_fd3dfab67c62"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000006484Member"
      decimals="INF"
      id="h_17_a55c3ccd_1415_4df7_9740_7378fb2a6502"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000006484Member"
      decimals="INF"
      id="h_19_65cf5a6e_a698_4402_a883_cc223d91746f"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000006484Member"
      decimals="4"
      id="h_20_b5f1f1e6_c847_44b0_979b_c6f55c59e9f3"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000006484Member"
      id="t_13_a628305b_c7c4_455a_81d5_5e501e05a8bc">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class A shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.00% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class A shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.00% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
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    <oef:MaterialChngDate
      contextRef="FY2026_C000006484Member"
      id="t_333_e6d96d27_4b21_eb44_deb2_ed46e23fafa3">2025-08-01</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2026_C000006485Member"
      id="t_339_dccf4929_d3ee_55ec_3339_9376273830c8">MFS&#xae; Global High Yield Fund</oef:FundName>
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      contextRef="FY2026_C000006485Member"
      id="t_15_1e580501_6ce7_4678_b0e0_429a666bfc5e">This annual shareholder report contains important information about MFS Global High Yield Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000006485Member"
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    <oef:AddlInfoTextBlock
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      id="t_17_febf3b79_fa8c_4d67_8438_782d7d759bbd">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;184&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class B shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;6.86&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006485Member"
      id="t_23_ea3858a7_d1ab_44b9_bd6a_15d2da9bf830">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class B over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2285969.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006485Member"
      id="t_324_2725fa8e_2ee8_4609_96be_c11f2d81b687">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006485Member"
      id="t_325_97d30039_f1bf_47bf_a78d_e72147402a7f">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006485Member"
      id="t_329_80d3a00b_ccfe_63bc_2426_2be1803d8232">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;B without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.40&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;B with CDSC (declining over six years from 4% to 0%)&lt;sup style="font-size: smaller; vertical-align: super;"&gt;&#xd7;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#xd7;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Assuming redemption at the end of the applicable period.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/b&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000006485Member"
      decimals="INF"
      id="h_58_66caa53e_ed29_41ab_a8a0_106a1f1732e2"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000006485Member"
      decimals="INF"
      id="h_60_09f44387_1642_4677_948f_b2ea0021179b"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000006485Member"
      decimals="INF"
      id="h_62_a4ce439c_bd21_4315_8690_3bd1b4b5ff75"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000006485Member"
      decimals="4"
      id="h_63_a1863946_91ad_4d0e_bc89_bf8ef873fbd4"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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      decimals="4"
      id="h_71_67216702_e9d6_4bb0_9111_133cb7e5a892"
      unitRef="pure">0.023</oef:PctOfTotalInv>
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      id="h_72_1f93b149_19ee_4e99_b706_7c04c95d2d47"
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      contextRef="TI20260131_C000006485Member_MX"
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      id="h_73_1a3172a2_0014_4be7_97dd_a0c27ce0f8c5"
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      contextRef="TI20260131_C000006485Member_LU"
      decimals="4"
      id="h_74_0f131876_2718_43ff_af8b_d527655fefaf"
      unitRef="pure">0.018</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006485Member_IN"
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      id="h_75_9dde297d_6589_4c97_bd05_73e9121d71b4"
      unitRef="pure">0.015</oef:PctOfTotalInv>
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      id="h_76_0d976e40_d07b_40d2_b0c8_08a0fbbe7cce"
      unitRef="pure">0.201</oef:PctOfTotalInv>
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      id="h_77_2b17ff97_6f91_4ca9_9d76_b2c3439ed0db"
      unitRef="pure">0.004</oef:PctOfTotalInv>
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      decimals="4"
      id="h_78_ee5445f1_ec9c_4cf0_a7d2_70e5c21e874b"
      unitRef="pure">0.458</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006485Member_FitchBRatingMember"
      decimals="4"
      id="h_79_ff968a7e_91b8_411d_bdb0_65e0dd2a8582"
      unitRef="pure">0.388</oef:PctOfTotalInv>
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      id="h_80_931eaae7_fdf3_4348_9027_2551e1d4caff"
      unitRef="pure">0.092</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006485Member_FitchCCRatingMember"
      decimals="4"
      id="h_81_875dc6b4_dd50_4c20_8f8e_423d1299f051"
      unitRef="pure">0.005</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006485Member_MoodysCRatingMember"
      decimals="4"
      id="h_82_da53cadc_3663_49ca_947f_a95693fb311f"
      unitRef="pure">0.000</oef:PctOfTotalInv>
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      id="h_83_155fba48_4095_4af9_847f_94a4ff87fbf0"
      unitRef="pure">0.001</oef:PctOfTotalInv>
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      decimals="4"
      id="h_84_7c53e0a7_bf8f_40cb_bcbd_3f2be8b9caa9"
      unitRef="pure">0.010</oef:PctOfTotalInv>
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      decimals="4"
      id="h_85_10f94da8_9e95_4c7b_b976_f9dee287ef03"
      unitRef="pure">0.001</oef:PctOfTotalInv>
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      decimals="4"
      id="h_86_2a4fd9fd_9e1c_4016_ad3a_98563420bdd2"
      unitRef="pure">0.041</oef:PctOfTotalInv>
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class B shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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      id="t_335_8c81cc18_66d1_fed9_9205_c28cd241e31f">1&#x2011;800&#x2011;225&#x2011;2606</oef:UpdProspectusPhoneNumber>
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class B shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2026_C000006485Member"
      id="t_337_8b36f401_66a6_bbd1_19be_0b5d0ac13186">2025-08-01</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2026_C000006486Member"
      id="t_342_e82c6870_2bb6_0b32_48fc_7c32d2c7584d">MFS&#xae; Global High Yield Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000006486Member"
      id="t_29_980f19f9_0422_4d9d_85a8_9bcbf692bc9f">This annual shareholder report contains important information about MFS Global High Yield Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000006486Member"
      id="t_30_3fdb9287_cf80_4ea4_8a77_96c910669cbc">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000006486Member"
      id="t_31_0682b636_32ea_4719_8ef9_b09307c08ce9">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000006486Member"
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      id="t_34_75bb7843_814e_43e4_a437_b994982ecba7">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;184&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_87_4ef58da1_ddbe_48a5_8ff4_c0d7682238db"
      unitRef="USD">184</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      unitRef="pure">0.0178</oef:ExpenseRatioPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class C shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;6.86&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006486Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class C over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286063.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      id="t_327_d0f2a592_1a07_4a74_9553_3f96a4c46ac2">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000006486Member"
      id="t_328_67ae8e07_b7a0_447d_a1f2_fdf1cf29237b">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006486Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;C without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;C with CDSC (1% for 12 months)&lt;sup style="font-size: smaller; vertical-align: super;"&gt;&#xd7;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#xd7;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Assuming redemption at the end of the applicable period.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
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      id="t_336_1d1936c2_9280_021c_e822_5887714fc514">C without sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_89_cf43482d_ce0e_4ef2_98fa_6df49fdc5064"
      unitRef="pure">0.0686</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_C000006486Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_90_7eb7e383_ceb0_4b69_a98a_59124e7da6fa"
      unitRef="pure">0.0339</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_91_5eed05dd_93e6_4311_8bf2_bb10972e81d1"
      unitRef="pure">0.0487</oef:AvgAnnlRtrPct>
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      id="t_335_650e92b7_24ad_1254_62f5_715e09a568cf">C with CDSC (1% for 12 months)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_92_c4c8ad9d_cb81_4e1a_9903_76ad1efdcbcc"
      unitRef="pure">0.0586</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_93_16ad09a2_9fb5_43b7_a949_cfba26e6436c"
      unitRef="pure">0.0339</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_94_03dae65e_c1a4_4a91_aa99_59188a007988"
      unitRef="pure">0.0487</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_95_87c9deae_a766_494f_98f8_f7f68398fcc8"
      unitRef="pure">0.0856</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_BloombergGlobalAggregateIndexMember"
      decimals="4"
      id="h_96_96b9a2ca_e7ca_46d5_a229_b3a5c97acb0e"
      unitRef="pure">-0.0179</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_97_295e282d_52ed_4ebc_ab8b_59ff2aa4781f"
      unitRef="pure">0.0127</oef:AvgAnnlRtrPct>
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    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_98_8f88a8ae_a7c5_4b20_a499_dbbd09fd4820"
      unitRef="pure">0.0791</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_ICEBofAGlobalHighYieldConstrainedIndexUSDHedgedMember"
      decimals="4"
      id="h_99_36b64421_7db0_40a5_abbf_d486669b7cfe"
      unitRef="pure">0.0419</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_100_5112f5a9_a494_4377_9536_87f502229a2b"
      unitRef="pure">0.0649</oef:AvgAnnlRtrPct>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/c&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
    <oef:AddlFundStatisticsTextBlock
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      id="t_40_c8e28d01_a1a5_4110_a581_70f7d9b5ca31">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000006486Member"
      decimals="INF"
      id="h_101_fe3f62cf_1977_4733_b8c1_b0155a12f5ba"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000006486Member"
      decimals="INF"
      id="h_103_b2f6927d_143c_4f5f_a199_9b77d66a6a25"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000006486Member"
      decimals="INF"
      id="h_105_ed14db3d_3ad6_4367_a313_705c73643397"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000006486Member"
      decimals="4"
      id="h_106_13729564_e6b8_4397_ae3c_e06c5fb45d2d"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000006486Member"
      id="t_41_0fa2cf74_6d99_49b0_94e6_390f4dd0b428">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class C shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class C shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
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    <oef:MaterialChngDate
      contextRef="FY2026_C000006486Member"
      id="t_341_4d8744b6_80b9_056c_caa4_27a5587a7874">2025-08-01</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2026_C000006487Member"
      id="t_343_572e983d_d741_ebaa_f00a_74312ec9ff41">MFS&#xae; Global High Yield Fund</oef:FundName>
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      contextRef="FY2026_C000006487Member"
      id="t_43_f375c06a_225f_43b4_b805_895b8c6cfe16">This annual shareholder report contains important information about MFS Global High Yield Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000006487Member"
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;I&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;81&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
</oef:ExpensesTextBlock>
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      decimals="INF"
      id="h_130_b6d383fa_2e8c_44e3_b736_cbccd16eab15"
      unitRef="USD">81</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006487Member"
      decimals="4"
      id="h_131_d1166b46_dc90_46b7_9974_c19e9d732552"
      unitRef="pure">0.0078</oef:ExpenseRatioPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class I shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.93&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006487Member"
      id="t_51_81598c9c_5fd8_4b2c_9182_59acb2bcbe5d">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class I over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286157.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006487Member"
      id="t_330_d75a1c7f_b137_4ad7_a282_d0c5474bc53b">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006487Member"
      id="t_331_1f2e4486_e0e6_4eb7_88f0_9a1a2b61d275">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006487Member"
      id="t_52_6fc4b29d_efdd_4deb_b696_3838385870e6">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;I without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/i&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      id="h_141_bd870d4d_7595_491b_9916_807d0ba03eac"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_143_71d82421_4aa7_473d_8309_f83844bb9aeb"
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    <oef:AdvisoryFeesPaidAmt
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      id="h_145_d7b2a852_b381_4965_b7ee_fba61ae582c3"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
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      id="h_146_ae0b1345_3d98_44d2_b085_f6957bb6db4d"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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    <oef:PctOfTotalInv
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      id="h_147_5b950560_10fc_4e6a_8863_68c85a4d57ed"
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      id="h_154_2d8c67f4_c0c9_4791_a9ce_8e161b15f79d"
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      id="h_155_00f7bd1e_5861_4713_bbf0_5430fbd57b89"
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      contextRef="TI20260131_C000006487Member_MX"
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      id="h_156_c767e8eb_36a5_4844_bcc0_5e55fd459a7d"
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      decimals="4"
      id="h_157_441705b0_6d20_485a_aa32_0674f69b6504"
      unitRef="pure">0.018</oef:PctOfTotalInv>
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      decimals="4"
      id="h_158_a0fcc562_dfd8_4b51_be03_745ee9e7fecb"
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      id="h_159_23bf91da_efc3_481b_9ff8_8bd8744ffb4c"
      unitRef="pure">0.201</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006487Member_FitchBBBRatingMember"
      decimals="4"
      id="h_160_5beddf21_da1d_4f98_98e0_f792f4e3524f"
      unitRef="pure">0.004</oef:PctOfTotalInv>
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      decimals="4"
      id="h_161_83d121d1_9e4f_4c54_9af8_083d9230c8c3"
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      id="h_162_95e927ca_82f1_46a5_8ead_62bcb2491f38"
      unitRef="pure">0.388</oef:PctOfTotalInv>
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      decimals="4"
      id="h_163_67826c70_aba5_4e49_b652_44198f89256f"
      unitRef="pure">0.092</oef:PctOfTotalInv>
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      id="h_164_0a883fbd_0247_4d1a_9f1d_caced0b570d5"
      unitRef="pure">0.005</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006487Member_MoodysCRatingMember"
      decimals="4"
      id="h_165_88fef5fa_ce2e_4920_a331_f65f9187c90b"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006487Member_FitchDRatingMember"
      decimals="4"
      id="h_166_db74251e_acce_4f6a_aece_8604a245d0d9"
      unitRef="pure">0.001</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006487Member_NotRatedMember"
      decimals="4"
      id="h_167_c80992ac_f345_41d5_b5ff_f7b3a3cf8fea"
      unitRef="pure">0.010</oef:PctOfTotalInv>
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      unitRef="pure">0.001</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006487Member_MoneyMarketFundsQualityMember"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class I shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 0.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class I shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 0.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
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    <oef:MaterialChngDate
      contextRef="FY2026_C000006487Member"
      id="t_342_6177a2db_7364_852b_f97e_611c667d55d5">2025-08-01</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2026_C000064677Member"
      id="t_346_49be5bc8_2258_9e6e_0af7_7d2ab51d2c28">MFS&#xae; Global High Yield Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000064677Member"
      id="t_57_00150b47_5d71_4700_959e_91fe8ab9a5ee">This annual shareholder report contains important information about MFS Global High Yield Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000064677Member"
      id="t_58_7f264e4f_2265_4259_97f9_4066a414ecaa">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
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      id="t_59_27431c73_594f_4f0e_a3fc_53fa83c3e95d">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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      id="t_60_e4c24fec_7838_4c16_84de_74bd7e35fcde">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R1&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;184&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      decimals="INF"
      id="h_170_0c1da8b2_118e_4084_a79f_54e4fb5cc239"
      unitRef="USD">184</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      decimals="4"
      id="h_171_459075f9_2600_42d2_9adb_52918c8a82d3"
      unitRef="pure">0.0178</oef:ExpenseRatioPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R1 shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.05&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R1 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286251.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      contextRef="FY2026_C000064677Member"
      id="t_334_cea21f84_5906_4392_b181_c6c8b6c283e1">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R1 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      id="h_177_a046009b_f37a_41c7_8417_dbd62ba78f21"
      unitRef="pure">0.0127</oef:AvgAnnlRtrPct>
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      id="t_345_deab9476_458a_570a_b12b_2502f095ba06">ICE BofA Global High Yield - Constrained Index (USD Hedged)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0791</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_179_a946f03c_8ae0_440a_ad66_e462e1074780"
      unitRef="pure">0.0419</oef:AvgAnnlRtrPct>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r1&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000064677Member"
      decimals="INF"
      id="h_181_1d3c737c_7f42_4264_ae4a_de01b8d10bd6"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000064677Member"
      decimals="INF"
      id="h_183_d2c99a00_5b89_4755_b415_306fcc410948"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000064677Member"
      decimals="INF"
      id="h_185_0b9eecd4_48f8_44dd_87ce_cd3d6d6a0f0b"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000064677Member"
      decimals="4"
      id="h_186_d46f7db3_1819_4431_b416_3f6b59fea320"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000064677Member"
      id="t_69_9c716426_ecef_4b3a_96f0_ae8c985446ab">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R1 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R1 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
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    <oef:MaterialChngDate
      contextRef="FY2026_C000064677Member"
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    <oef:FundName
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      id="t_349_f3bc73bd_9742_fd76_f50b_4d6b46e88678">MFS&#xae; Global High Yield Fund</oef:FundName>
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      id="t_71_3345a0a3_b8b5_442f_b37c_2c39f9db516c">This annual shareholder report contains important information about MFS Global High Yield Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R2&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;133&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.28&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000064678Member"
      decimals="INF"
      id="h_210_0732a5ed_94cb_4411_a58c_e08d0875e530"
      unitRef="USD">133</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000064678Member"
      decimals="4"
      id="h_211_9ef4131b_de4a_4f8c_86da_a38fd58c442a"
      unitRef="pure">0.0128</oef:ExpenseRatioPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R2 shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.58&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000064678Member"
      id="t_79_9c11a9cc_78ae_46ca_876f_6cf09e21a8d2">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R2 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286345.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000064678Member"
      id="t_336_1d15feba_c8a1_4858_94f5_e167133eab94">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000064678Member"
      id="t_337_e0896a84_98db_4821_a7ed_4545dec31d33">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000064678Member"
      id="t_80_b95f3db4_e730_453b_8dfb_163f516945df">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R2 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.58&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.95&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.39&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r2&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000064678Member"
      decimals="INF"
      id="h_221_4f148b8c_fb4f_4829_a71b_95ff5b8d7bd2"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      decimals="INF"
      id="h_223_a1df96b6_6cdf_4372_8aa9_346bc25de939"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000064678Member"
      decimals="INF"
      id="h_225_477563a4_0412_4945_9b46_9cd103eed665"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000064678Member"
      decimals="4"
      id="h_226_0be3c8f9_ebd4_4b8c_a13e_35402c7a9b3a"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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      id="h_237_8962822c_af1d_4861_8b17_4bf74a7d3370"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R2 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.25% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R2 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.25% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
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    <oef:MaterialChngDate
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      id="t_346_e736e6df_8414_e46d_a868_1feba51ff1e4">2025-08-01</oef:MaterialChngDate>
    <oef:FundName
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      id="t_352_88cec35c_9cdb_1acd_4341_aafe26d6844a">MFS&#xae; Global High Yield Fund</oef:FundName>
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      id="t_87_1e53b19e_b6ca_4a7a_a4fd_edb3457e63c2">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R3&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;107&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
</oef:ExpensesTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R3 shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.84&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R3 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286439.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      id="t_339_b9694c7d_778c_44c9_86e8_0f8e9bac5841">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000064679Member"
      id="t_340_39d12a87_61c8_4e57_a115_9775742a04c5">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      id="t_94_19627f65_c631_4516_8c36_8c2037c1b557">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R3 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.84&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.18&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.71&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r3&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
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      id="t_96_c0118eae_c09c_48b2_87cf_a182de47317c">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000064679Member"
      decimals="INF"
      id="h_261_4ee14465_5baa_4ca6_9f70_2d7c199f0638"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000064679Member"
      decimals="INF"
      id="h_263_863037b8_d4fa_45b4_a016_3da223a7bdb9"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000064679Member"
      decimals="INF"
      id="h_265_7d7266f6_834b_42bc_8a56_4bee7c578c12"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000064679Member"
      decimals="4"
      id="h_266_f9297254_cd2d_4b10_aba6_7ee42cb065fd"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000064679Member"
      id="t_97_65ddb2eb_3591_4bf0_b267_9eaa45762a56">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R3 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.00% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R3 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 1.00% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
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    <oef:MaterialChngDate
      contextRef="FY2026_C000064679Member"
      id="t_350_c7c22028_30bf_48a6_c2de_c6c07bd3ce72">2025-08-01</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2026_C000064680Member"
      id="t_355_f4a91d61_8154_f86b_d4fd_f3b582ca21d3">MFS&#xae; Global High Yield Fund</oef:FundName>
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      id="t_99_7050bfa8_4560_4075_8f61_1c7a4671f45a">This annual shareholder report contains important information about MFS Global High Yield Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000064680Member"
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R4&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;81&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.78&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R4 shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;8.11&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000064680Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R4 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286533.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000064680Member"
      id="t_342_cd37ca4f_5aa8_44aa_8a0f_942a94f627ca">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000064680Member"
      id="t_343_b6c1b549_9a5c_45c4_884b_16dd57dc3ccf">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R4 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.48&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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      id="h_293_4f25d9fa_b139_433a_8d18_dcc6bb1ce0f2"
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      id="t_348_95696575_8f05_4496_e139_247bcfe7345f">Bloomberg Global Aggregate Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_295_838e2f0f_754d_4843_8bcd_fffc58fefae0"
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      id="h_296_6f2b7630_7ea9_40fb_814b_2680b77aa699"
      unitRef="pure">-0.0179</oef:AvgAnnlRtrPct>
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      id="h_297_7e3c4518_deca_4fc4_a450_58ca84b0b6e1"
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      id="t_349_7b3706f8_23f3_db6f_f840_0cc867bd9751">ICE BofA Global High Yield - Constrained Index (USD Hedged)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_298_db4397a2_674b_45cb_aa79_46cbe33ce35e"
      unitRef="pure">0.0791</oef:AvgAnnlRtrPct>
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      contextRef="FiveY2026_ICEBofAGlobalHighYieldConstrainedIndexUSDHedgedMember"
      decimals="4"
      id="h_299_3465f56a_eb5d_4008_b874_33aa9af1f19f"
      unitRef="pure">0.0419</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_300_3ac59d03_8855_4fe2_9589_b90eb138a954"
      unitRef="pure">0.0649</oef:AvgAnnlRtrPct>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r4&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000064680Member"
      decimals="INF"
      id="h_301_2244fbbe_663a_4989_917a_dc61d97e6077"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000064680Member"
      decimals="INF"
      id="h_303_e3bc562d_68e9_4817_971e_e1a0df80fe8a"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000064680Member"
      decimals="INF"
      id="h_305_cf00af10_792a_403c_a93c_2c9d5f8ecb3a"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000064680Member"
      decimals="4"
      id="h_306_e846c70a_cee2_420d_bf2a_224da63342ab"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
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      id="t_111_cdb6c3cd_b9ab_4cd1_8194_53f5c5fe00e3">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R4 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 0.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R4 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 0.75% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
</oef:MaterialFundChngExpensesTextBlock>
    <oef:MaterialChngDate
      contextRef="FY2026_C000064680Member"
      id="t_352_2a6386c3_3a8d_644f_d956_cde71b1207b4">2025-08-01</oef:MaterialChngDate>
    <oef:FundName
      contextRef="FY2026_C000064681Member"
      id="t_348_d5c83882_1678_3642_1c0e_146659d95dcb">MFS&#xae; Global High Yield Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000064681Member"
      id="t_113_eec5fbda_2ebf_4187_ab40_ea10fec22c3a">This annual shareholder report contains important information about MFS Global High Yield Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000064681Member"
      id="t_114_ea48f4df_e2c0_4bfb_b7d9_7829cd1c9ca3">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
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      contextRef="FY2026_C000064681Member"
      id="t_115_bd8ab70e_07a8_400f_8306_d80d06e2fc35">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000064681Member"
      id="t_117_8e78006d_a209_471c_bf2b_c9a5042e4874">funds.mfs.com</oef:AddlInfoWebsite>
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      contextRef="FY2026_C000064681Member"
      id="t_118_94d7eb06_4acc_4a8c_8174_72d92b81d2d6">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000064681Member"
      id="t_116_277ce64e_4225_40c1_9124_096df6a7702a">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt;This report describes &lt;/b&gt; &lt;b&gt;certain changes&lt;/b&gt; &lt;b&gt; to the Fund &lt;/b&gt; &lt;b&gt;that&#160;occurred&lt;/b&gt; &lt;b&gt; during the reporting period. &lt;/b&gt;&lt;/div&gt;
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      id="t_119_7d98aaae_553b_473d_94fb_654a00f16d2d">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment ~&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment ~&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R6&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;71&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.68&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&#x2dc; Expenses are direct expenses and do not include underlying fund fees and expenses.&lt;/div&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000064681Member"
      decimals="INF"
      id="h_330_49358885_3a86_4b57_9ea1_973ae226ddd6"
      unitRef="USD">71</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000064681Member"
      decimals="4"
      id="h_331_f73671c3_c775_455f_8c3d_6802a66cbec1"
      unitRef="pure">0.0068</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000064681Member"
      id="t_120_a820bee1_5a3c_41af_b96e_08d000c79ecc">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R6 shares of the MFS Global High Yield Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;8.23&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;8.56&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Global Aggregate Index. The fund's other benchmark, the ICE BofA Global High Yield - Constrained Index (USD Hedged), generated a return of &lt;span style="white-space: nowrap;"&gt;7.91%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In addition to investing directly in portfolio securities, the fund also invests indirectly in portfolio securities through investment in the MFS High Yield Pooled Portfolio, a mutual fund also advised by MFS. The discussion below reflects both the fund&#x2019;s direct and indirect investments.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Bond selection within the North America, Europe/UK and EM regions, particularly within CCC, BB and B-rated bonds, benefited relative performance. From a sector perspective, favorable bond selection within the basic industry, consumer cyclicals, capital goods, and technology sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's yield curve positioning also contributed to relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the ICE BofA Global High Yield - Constrained Index (USD Hedged):&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's overweight allocation to the capital goods sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's holding of cash also detracted from relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000064681Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R6 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286627.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000064681Member"
      id="t_345_8f26d987_6175_4e81_9f02_11cfce0fb554">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000064681Member"
      id="t_346_1de6b7f7_8404_4641_8a87_86e9c308671d">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000064681Member"
      id="t_122_7eeb1544_fc54_4a65_8ffd_2223a103fdf6">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R6 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Global Aggregate Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.56&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(1.79&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;ICE BofA Global High Yield - Constrained Index (USD Hedged) &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.91&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.19&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.49&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_333_bf730589_29bd_465f_bd67_977903cb8c3a"
      unitRef="pure">0.0457</oef:AvgAnnlRtrPct>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r6&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;206,952,691&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;137&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1,200,687&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;38&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000064681Member"
      decimals="INF"
      id="h_341_e78dfc25_8f91_4ad3_8e0d_fc9380cc0735"
      unitRef="USD">206952691</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000064681Member"
      decimals="INF"
      id="h_343_8c11cc2a_6ea6_4a57_9496_1c669522c205"
      unitRef="Holding">137</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000064681Member"
      decimals="INF"
      id="h_345_97499671_b799_4db8_9b3d_6b9954602914"
      unitRef="USD">1200687</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000064681Member"
      decimals="4"
      id="h_346_5c57ab43_4491_4acb_9b77_887a477d9f5e"
      unitRef="pure">0.38</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000064681Member"
      id="t_125_c675ff8b_63dd_4bbe_b075_478df5c731c7">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;95.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Issuer country weightings&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United States&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;59.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Canada&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;United Kingdom&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;France&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Italy&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Brazil&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Mexico&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Luxembourg&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;India&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Countries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;20.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;45.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;38.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;9.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;D&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;4.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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      id="t_357_8a4ae5ef_3dea_8a5c_e9d9_1ab5c0c1fe35">&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;</oef:CreditRatingsSelectionTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;MATERIAL FUND CHANGES&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;



&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R6 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 0.67% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;

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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;This is a summary of certain changes to the fund since February 1, 2025. For more complete information, you may review the fund's prospectus as amended, which is available at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt; or upon request at 1&#x2011;800&#x2011;225&#x2011;2606.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 10pt; margin: 0px 0px 7.5pt 0px;"&gt;Effective August 1, 2025, for Class R6 shares, the investment adviser has agreed in writing to pay a portion of the fund&#x2019;s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total operating expenses do not exceed 0.67% annually of the class&#x2019;s average daily net assets. This written agreement will continue until modified by the fund&#x2019;s Board of Trustees, but such agreement will continue at least until May 31, 2027.&lt;/div&gt;
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    <oef:MaterialChngDate
      contextRef="FY2026_C000064681Member"
      id="t_356_c9968600_3d9a_3c7d_0a59_b42c821ae502">2025-08-01</oef:MaterialChngDate>
    <oef:ClassName
      contextRef="FY2026_C000118060Member"
      id="t_350_ee7b5ade_7afc_0e10_ca91_328305a42178">MFS&#xae; High Yield Pooled Portfolio</oef:ClassName>
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      contextRef="FY2026_C000118060Member"
      id="t_355_b9d4cc27_da1e_88fe_f0d4_dd23cb702a87">MFS&#xae; High Yield Pooled Portfolio</oef:FundName>
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      contextRef="FY2026_C000118060Member"
      id="t_127_52326b3d_32be_4def_b3a0_cf8b1287ae4e">This annual shareholder report contains important information about MFS High Yield Pooled Portfolio for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      id="t_129_929678b8_6b22_41da_b5aa_c9eaf6d81b20">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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      contextRef="FY2026_C000118060Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Fund Name&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; vertical-align: bottom; text-align: center; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; padding: 0 3pt 0 3pt;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;MFS High Yield Pooled Portfolio&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;3&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, shares of the MFS High Yield Pooled Portfolio (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;8.64%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection in CCC-rated bonds, particularly within the consumer cyclical, capital goods, and technology sectors, strengthened relative returns. Favorable security selection in BB-rated bonds also helped, most notably within the basic industry, consumer cyclicals, finance companies, and energy sectors.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Security selection within the communications sector held back relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund&#x2019;s cash position weakened relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000118060Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in the fund over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287567.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      contextRef="FY2026_C000118060Member"
      id="t_348_c8cd6a3b_1db2_4d99_a75d_9287d83197bb">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000118060Member"
      id="t_349_e59bb190_6184_4e19_a2dc_3b2bae7069f4">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the fund for the periods shown. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Fund Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;MFS High Yield Pooled Portfolio&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.43&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_377_3325b472_3b14_42f0_9a89_acf27372c995"
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    <oef:AvgAnnlRtrPct
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      unitRef="pure">0.0770</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.0454</oef:AvgAnnlRtrPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;553,158,062&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;364&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.8&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;0&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;50&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; The fund does not pay a management fee.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000118060Member"
      decimals="INF"
      id="h_381_bba1bcb2_e96b_4aff_b549_5e529d98bad0"
      unitRef="USD">553158062</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000118060Member"
      decimals="INF"
      id="h_383_6415c33f_c2da_4601_9508_79f2a8a5f0b6"
      unitRef="Holding">364</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000118060Member"
      decimals="INF"
      id="h_385_7e669b8c_16fe_43a4_ac7e_32017f61891e"
      unitRef="USD">0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000118060Member"
      decimals="4"
      id="h_386_66394254_c642_44e4_9dc7_9f4ade5e3826"
      unitRef="pure">0.50</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000118060Member"
      id="t_138_f4d499a0_6395_4201_baad_2c70f0187ea0">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;39.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;2.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000118060Member_FixedIncomeSecuritiesMember"
      decimals="4"
      id="h_387_9c728b9c_72b0_9324_331a_9a07f4a33ba2"
      unitRef="pure">0.976</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000118060Member_MoneyMarketFundsMember"
      decimals="4"
      id="h_388_9b64ef5e_2f97_959e_116f_9ebe7573c830"
      unitRef="pure">0.023</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000118060Member_EquityMember"
      decimals="4"
      id="h_389_7cc81733_7e7d_7392_e85c_121c68cba68d"
      unitRef="pure">0.001</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000118060Member_FitchBBBRatingMember"
      decimals="4"
      id="h_390_da123339_6996_5c81_1f30_30e52d357d3d"
      unitRef="pure">0.004</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000118060Member_FitchBBRatingMember"
      decimals="4"
      id="h_391_6d0d1f8b_6a5d_1691_cc00_9bade210d616"
      unitRef="pure">0.450</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
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      decimals="4"
      id="h_392_1a721821_9ace_4971_29e5_ff41371d9dc0"
      unitRef="pure">0.390</oef:PctOfTotalInv>
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      id="h_393_7337f78d_9c01_98ed_8c81_9c550862bf1e"
      unitRef="pure">0.114</oef:PctOfTotalInv>
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      decimals="4"
      id="h_394_33b98151_de1b_73c8_ecc9_beb207c22741"
      unitRef="pure">0.003</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000118060Member_NotRatedMember"
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      id="h_395_336008a3_07ed_a0a2_8802_4fe06512716d"
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      contextRef="TI20260131_C000118060Member_NonFixedIncomeMember"
      decimals="4"
      id="h_396_aee1d952_c9a1_7d1c_ec72_03b57fbb99a6"
      unitRef="pure">0.001</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000118060Member_MoneyMarketFundsQualityMember"
      decimals="4"
      id="h_397_4030d133_281d_3bcb_b045_46a02848033f"
      unitRef="pure">0.023</oef:PctOfTotalInv>
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      contextRef="FY2026_C000118060Member"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2026_C000006471Member"
      id="t_360_c701517f_c9c9_6877_cdc0_214b101b99f0">MFS&#xae; High Income Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000006471Member"
      id="t_139_34bff478_edce_4e51_83ae_2d105e96078f">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000006471Member"
      id="t_140_f60e1564_a887_4462_8a3b_4a1b94c63aee">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000006471Member"
      id="t_141_af27c777_5a02_499a_8379_422380861196">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000006471Member"
      id="t_143_f287ea54_9707_4c8b_b1ff_8b3e0c5a1eac">funds.mfs.com</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000006471Member"
      id="t_144_cec9a68e_0c0f_4500_bcb6_7df0ac2a3618">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000006471Member"
      id="t_142_900d86ad_94c4_48e9_b00f_cc08eb83b132">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;88&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000006471Member"
      decimals="INF"
      id="h_387_e48d4332_fce3_4c03_9554_7a85ced992ce"
      unitRef="USD">88</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006471Member"
      decimals="4"
      id="h_388_e3410f1b_4be0_4193_9cef_bf43ee2a50a2"
      unitRef="pure">0.0085</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000006471Member"
      id="t_146_8e6d6761_a75b_4fb7_9e82_3230559b8ea0">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class A shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.67%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006471Member"
      id="t_147_2d15a999_252c_4046_89fa_ff241e39fe7c">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class A over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests. This graph includes the deduction of the maximum applicable sales charge.&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286721.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006471Member"
      id="t_350_bc56007d_b6d6_4f80_950f_0b1717203d24">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006471Member"
      id="t_351_16c15823_9789_4cfe_8014_36f2c3b5ed21">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006471Member"
      id="t_148_7a828c7a_b7a3_453e_b5bf_7006ed66dca2">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;A without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.45&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;A with initial sales charge (4.25%)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.90&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.00&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      decimals="4"
      id="h_396_b9359b73_b737_4dcf_9e6a_65c0a25f689d"
      unitRef="pure">-0.0020</oef:AvgAnnlRtrPct>
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      unitRef="pure">0.0188</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_399_ab9a8d78_684d_49c1_a37c_30708e206b0e"
      unitRef="pure">0.0454</oef:AvgAnnlRtrPct>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/a&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
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      unitRef="USD">2001593093</us-gaap:AssetsNet>
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      id="h_403_588f2f87_224d_4c5d_830f_f63f0f57cfe0"
      unitRef="Holding">367</oef:HoldingsCount>
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      id="h_405_7cb5ae5a_1b4d_454c_9093_77339482c2b1"
      unitRef="USD">8553745</oef:AdvisoryFeesPaidAmt>
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      unitRef="pure">0.51</us-gaap:InvestmentCompanyPortfolioTurnover>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      id="h_409_b1bdfe63_847f_9496_e5c9_e97410f4df2d"
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      id="h_411_502e8c01_6ec7_431a_58fa_aff00e65c519"
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      id="h_414_8bde28d0_4898_6cb1_88c4_699fd71a4b4a"
      unitRef="pure">0.003</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006471Member_NotRatedMember"
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      id="h_415_4e333a1d_196a_a4b4_3395_0298e4bd42df"
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    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006471Member_NonFixedIncomeMember"
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      id="h_416_b6a9b5da_179f_c231_f526_1cb4d5ffb222"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;

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    <oef:FundName
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      id="t_360_fedb273c_1a2a_c9ed_c58d_f728fd42a073">MFS&#xae; High Income Fund</oef:FundName>
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      contextRef="FY2026_C000006476Member"
      id="t_152_f615b34a_abf5_43bc_9151_de44f1fba749">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000006476Member"
      id="t_153_7b14fb94_dccd_4b63_a4db_f709657898ec">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000006476Member"
      id="t_154_bcfe9813_4a6b_47e4_9b7a_a101d02f7114">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000006476Member"
      id="t_156_8a4a077b_3418_4cc6_8463_794d9c226ebf">funds.mfs.com</oef:AddlInfoWebsite>
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      contextRef="FY2026_C000006476Member"
      id="t_157_dee60589_0395_41bc_868a_40849f8ffe38">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000006476Member"
      id="t_155_f2567f2f_36a5_45d3_8b6b_bc272686c879">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;165&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">165</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006476Member"
      decimals="4"
      id="h_408_a8361368_852f_40d3_8e79_1e189caea8ca"
      unitRef="pure">0.0160</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000006476Member"
      id="t_159_5893aafd_0e52_4009_95a1_115e5bd79c3d">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class B shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;6.87%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006476Member"
      id="t_160_99137934_68ca_4433_a56e_adf6f85ab152">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class B over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286815.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006476Member"
      id="t_352_a8828193_d844_46f4_a4d6_b8e460d6395c">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006476Member"
      id="t_353_12b1e232_4a9a_46b7_b9a8_d9f52453d90d">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006476Member"
      id="t_357_0e7d0fa2_0660_082a_b9a7_c698845d37d0">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;B without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;B with CDSC (declining over six years from 4% to 0%)&lt;sup style="font-size: smaller; vertical-align: super;"&gt;&#xd7;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

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&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#xd7;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Assuming redemption at the end of the applicable period.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/b&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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      id="h_434_24d652e4_d1a7_5946_8695_5926dd9f330c"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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    <oef:FundName
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      id="t_371_d3180687_05d1_c72a_dba2_bf0133e6bbaf">MFS&#xae; High Income Fund</oef:FundName>
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      id="t_165_b4c9b170_5e89_4bc4_8ff4_90148a5e4b50">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000006477Member"
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      contextRef="FY2026_C000006477Member"
      id="t_167_3f2b15b6_d1c0_43ec_820c_7f631eeb05ff">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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      contextRef="FY2026_C000006477Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;165&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="t_358_15c3ccc1_4cc3_ac13_4f1e_586fc26ad243">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class C shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;6.87%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006477Member"
      id="t_359_afaa48bb_d067_35d7_051e_b942d8e8d523">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class C over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2286909.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006477Member"
      id="t_354_4c83055c_61cc_4207_bc07_c7028f729b7a">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006477Member"
      id="t_355_6ffc9ce2_2cff_407c_8c06_de9aa2735a32">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006477Member"
      id="t_360_469d5df9_7451_6956_60b2_1cd60cf6afb8">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;C without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;C with CDSC (1% for 12 months)&lt;sup style="font-size: smaller; vertical-align: super;"&gt;&#xd7;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#xd7;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Assuming redemption at the end of the applicable period.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/c&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
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    <us-gaap:AssetsNet
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    <oef:HoldingsCount
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_FixedIncomeSecuritiesMember"
      decimals="4"
      id="h_447_004bc811_da12_f1c5_4625_b2652ad11fa0"
      unitRef="pure">0.970</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_MoneyMarketFundsMember"
      decimals="4"
      id="h_448_7c7325ac_b192_7290_652c_cd088fc8fc2c"
      unitRef="pure">0.030</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006477Member_EquityMember"
      decimals="4"
      id="h_449_8fd0989b_b02d_629f_1d1a_b96744a54dac"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_FitchBBBRatingMember"
      decimals="4"
      id="h_450_6e39ede0_e61b_fe8e_1fbe_dac78a509b9a"
      unitRef="pure">0.004</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_FitchBBRatingMember"
      decimals="4"
      id="h_451_6c326564_67ed_12d0_56e7_9fdf98cc2ae9"
      unitRef="pure">0.454</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_FitchBRatingMember"
      decimals="4"
      id="h_452_03437d10_c8a0_4ecd_7ff8_2f8527e6d2d0"
      unitRef="pure">0.384</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_FitchCCCRatingMember"
      decimals="4"
      id="h_453_6688787e_e4bc_f27b_3e10_63c9267d87e6"
      unitRef="pure">0.110</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_FitchCCRatingMember"
      decimals="4"
      id="h_454_1d9ed8e8_6898_55ec_3ea9_64ebb9090561"
      unitRef="pure">0.003</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_NotRatedMember"
      decimals="4"
      id="h_455_a76fb683_0b2d_cc31_f869_aedbb7bbda66"
      unitRef="pure">0.015</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_NonFixedIncomeMember"
      decimals="4"
      id="h_456_034feb23_45a3_5094_434b_78257a7cda96"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006477Member_MoneyMarketFundsQualityMember"
      decimals="4"
      id="h_457_869586e5_55d2_0455_94a3_a2fa60bdd16a"
      unitRef="pure">0.030</oef:PctOfTotalInv>
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      contextRef="FY2026_C000006477Member"
      id="t_367_589be523_e316_fe11_40b9_4cb0b112de9d">

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;

</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2026_C000006478Member"
      id="t_366_b1bd4bf7_b86f_9da1_8d7a_80ff4b484251">MFS&#xae; High Income Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000006478Member"
      id="t_178_8aa9d694_716a_4c62_bfe0_fac1d2e213b8">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000006478Member"
      id="t_179_0e7d3bf5_7720_46cc_8917_29c0b4017653">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000006478Member"
      id="t_180_0846301b_af42_46fb_ae2a_2f06eb5c2f8e">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000006478Member"
      id="t_182_a2199e59_5d9c_4e8e_a9eb_d31ba3c2b91d">funds.mfs.com</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000006478Member"
      id="t_183_40a66489_a5fa_46e9_aae1_02162477caad">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000006478Member"
      id="t_181_65bb01ac_a3e2_42d0_9940_20cf830a62d6">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;I&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;62&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000006478Member"
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      id="h_447_5ad5340c_10a1_442d_b828_cc598cd264b7"
      unitRef="USD">62</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006478Member"
      decimals="4"
      id="h_448_d17f34db_0453_49cd_83f2_fa7af4f8a3bf"
      unitRef="pure">0.0060</oef:ExpenseRatioPct>
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      id="t_360_463855c0_f118_186a_6fda_e8f7a81b4fc3">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class I shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.94%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class I over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287003.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
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      id="t_356_e0891695_0351_47dd_98f4_561742279b55">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000006478Member"
      id="t_357_4f4f3ded_e671_4b4d_9bfa_df68ad5cf7e9">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;I without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.94&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.05&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.72&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/i&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
    <oef:AddlFundStatisticsTextBlock
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      id="t_365_c9923154_1c03_28d0_f6f6_5943a4decae2">&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000006478Member"
      decimals="INF"
      id="h_458_46988c8e_2a36_49bc_975a_1bf2a05df1de"
      unitRef="USD">2001593093</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000006478Member"
      decimals="INF"
      id="h_460_c43c73a7_df03_4381_b23d_d967d5d775a1"
      unitRef="Holding">367</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000006478Member"
      decimals="INF"
      id="h_462_4547603e_3e5d_4732_8043_cd91a6805a08"
      unitRef="USD">8553745</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000006478Member"
      decimals="4"
      id="h_463_906dfac3_b3e2_45a8_8c8c_7d2e16ab115f"
      unitRef="pure">0.51</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000006478Member"
      id="t_190_e91d0468_bf3f_427b_895a_f8515fb4ef48">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_FixedIncomeSecuritiesMember"
      decimals="4"
      id="h_464_7699902d_957c_3baf_f5ea_9d7ade9f2118"
      unitRef="pure">0.970</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_MoneyMarketFundsMember"
      decimals="4"
      id="h_467_b88b85f7_a144_0324_4f78_f9ecf1313449"
      unitRef="pure">0.030</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_EquityMember"
      decimals="4"
      id="h_466_91ab0a51_1ef7_2c55_0c52_f4b7f86d4866"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_FitchBBBRatingMember"
      decimals="4"
      id="h_468_8db2d597_65f3_a14a_5e73_9b2187942d95"
      unitRef="pure">0.004</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_FitchBBRatingMember"
      decimals="4"
      id="h_469_65154ae2_8fbf_5b60_aa9e_4a1521dcc51e"
      unitRef="pure">0.454</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_FitchBRatingMember"
      decimals="4"
      id="h_470_3a1d4a84_318e_d76a_674d_93041a52e657"
      unitRef="pure">0.384</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_FitchCCCRatingMember"
      decimals="4"
      id="h_471_8c8785fe_89c3_5f91_50a2_4bc599dbc705"
      unitRef="pure">0.110</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006478Member_FitchCCRatingMember"
      decimals="4"
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      unitRef="pure">0.003</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006478Member_NotRatedMember"
      decimals="4"
      id="h_473_fc0e679b_dcf7_9721_9b67_c9f0ebd62fb2"
      unitRef="pure">0.015</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006478Member_NonFixedIncomeMember"
      decimals="4"
      id="h_474_5eb1f094_9758_68cf_2ee2_f7a015c1cd38"
      unitRef="pure">0.000</oef:PctOfTotalInv>
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      contextRef="TI20260131_C000006478Member_MoneyMarketFundsQualityMember"
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      id="h_475_9a665a60_8fb9_f2f4_c316_76183532d94a"
      unitRef="pure">0.030</oef:PctOfTotalInv>
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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    <oef:FundName
      contextRef="FY2026_C000006480Member"
      id="t_370_d3cc8d85_b9e5_0c34_e93c_08bbdbec658c">MFS&#xae; High Income Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000006480Member"
      id="t_191_41fe2463_575a_4709_9faa_ad5b665077f0">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000006480Member"
      id="t_192_da44074b_515e_450d_beae_faac7facc3a4">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000006480Member"
      id="t_193_e93964da_c33e_4a17_b208_c262f5bdb185">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000006480Member"
      id="t_195_bbe242fe_a7a8_4985_b371_aab12b1e6128">funds.mfs.com</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000006480Member"
      id="t_196_e6d29c75_4f1b_448b_adcb_0555e1fd1a61">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
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      contextRef="FY2026_C000006480Member"
      id="t_194_dc0f1ae2_17c0_4736_b296_95f0b80a66bb">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R1&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;165&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">165</oef:ExpensesPaidAmt>
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      decimals="4"
      id="h_465_63de34db_b11b_4f61_afd0_8ee311546864"
      unitRef="pure">0.0160</oef:ExpenseRatioPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R1 shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;6.87%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R1 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287097.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006480Member"
      id="t_358_55aab8b0_28d6_4c52_a677_8e3c1ec962eb">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006480Member"
      id="t_359_3dc879f3_2bb9_46a3_9512_8f5e80826da8">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006480Member"
      id="t_364_b6279161_0f68_9518_9e83_98a96c003fb8">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R1 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.87&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      unitRef="pure">0.0303</oef:AvgAnnlRtrPct>
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      id="h_468_f2d0921c_1eed_4615_aa1a_c3316f853182"
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      unitRef="pure">0.0770</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_473_379f40c5_893b_4db8_a5cb_4054160efc1a"
      unitRef="pure">0.0454</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_474_e9174cf3_846d_4725_9568_7671610376fe"
      unitRef="pure">0.0675</oef:AvgAnnlRtrPct>
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r1&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      id="h_484_4f15ca25_c096_d6fd_10e0_2fd0071ae55f"
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      id="h_485_6d378d3b_9388_5d09_1f45_738e0cc9e1b7"
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      id="h_486_c282f430_6880_a777_862d_4c7bb74c2cda"
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      id="h_490_3d462d0b_4ac6_c846_a9e0_629f88713f60"
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      contextRef="TI20260131_C000006480Member_MoneyMarketFundsQualityMember"
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      id="h_491_0bb203ce_cdce_71ac_5167_19a409463108"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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    <oef:FundName
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      id="t_372_f23d3ca7_7233_0433_a046_bf08a6cf70b7">MFS&#xae; High Income Fund</oef:FundName>
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      contextRef="FY2026_C000006482Member"
      id="t_204_276634a9_37d8_4ab6_b39d_b3c0d6269766">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      contextRef="FY2026_C000006482Member"
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      contextRef="FY2026_C000006482Member"
      id="t_206_1f998a7c_da21_4fb2_ab89_4fa5bfc70a15">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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      contextRef="FY2026_C000006482Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R2&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;114&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.10&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R2 shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.41%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R2 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287191.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      contextRef="FY2026_C000006482Member"
      id="t_360_655ea3eb_05db_4881_8f65_c28d7e500bb0">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006482Member"
      id="t_361_7a066f34_c10a_4942_a06f_d342f1b74663">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R2 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.47&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      id="h_486_6c901bb6_2779_4e36_92bc_e75959471de0"
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      id="h_487_c38301de_1a23_48de_82ec_78cd8b440ac1"
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      decimals="4"
      id="h_488_c68b8784_a00b_440b_8e86_40084c5330be"
      unitRef="pure">0.0188</oef:AvgAnnlRtrPct>
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      id="t_371_d0c1ea16_1603_398f_466a_2c968793bf6b">Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_489_12a391c6_b084_4418_a2dd_a92d1f591a7c"
      unitRef="pure">0.0770</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_490_4ea009d9_d3f9_4587_b64e_fc068ead47a2"
      unitRef="pure">0.0454</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_491_f1258923_33a0_434d_bfd7_867567df60ff"
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r2&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000006482Member"
      decimals="INF"
      id="h_492_520aa5de_319f_4cc9_ae42_67e757b22f90"
      unitRef="USD">2001593093</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000006482Member"
      decimals="INF"
      id="h_494_b221bb6d_ab83_4976_82fb_a0d3532334b6"
      unitRef="Holding">367</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000006482Member"
      decimals="INF"
      id="h_496_3a839ba1_209d_4b0e_b312_8a56eff46491"
      unitRef="USD">8553745</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000006482Member"
      decimals="4"
      id="h_497_29d96d3e_d4e3_4e9f_86d6_c8589c76fbef"
      unitRef="pure">0.51</us-gaap:InvestmentCompanyPortfolioTurnover>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_FixedIncomeSecuritiesMember"
      decimals="4"
      id="h_498_3701d61d_5f9c_f27f_f4b8_9b28393ad2a1"
      unitRef="pure">0.970</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_MoneyMarketFundsMember"
      decimals="4"
      id="h_499_bb10f9d6_ce1b_8e0e_c0d5_d1c0ccf95e14"
      unitRef="pure">0.030</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_EquityMember"
      decimals="4"
      id="h_500_83e4f3a2_8a6f_d062_b72c_0fb3a8b2e24d"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_FitchBBBRatingMember"
      decimals="4"
      id="h_501_d06c6d8d_c73a_dd60_8d24_b63f18184e0e"
      unitRef="pure">0.004</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_FitchBBRatingMember"
      decimals="4"
      id="h_502_ce06dc8e_a51f_6457_9497_a59845b7eb1b"
      unitRef="pure">0.454</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_FitchBRatingMember"
      decimals="4"
      id="h_503_06df0012_c1ba_781c_5849_8d4189708abc"
      unitRef="pure">0.384</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_FitchCCCRatingMember"
      decimals="4"
      id="h_504_a93647ba_3f87_d51e_db2f_a4120179f595"
      unitRef="pure">0.110</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_FitchCCRatingMember"
      decimals="4"
      id="h_505_e23fb97e_8d14_911e_c13b_5daf70ae1772"
      unitRef="pure">0.003</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_NotRatedMember"
      decimals="4"
      id="h_506_75e65221_ff67_6c0c_f334_fa9b408e5035"
      unitRef="pure">0.015</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_NonFixedIncomeMember"
      decimals="4"
      id="h_507_01b92c24_82e0_5721_3e8d_353f332e1981"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006482Member_MoneyMarketFundsQualityMember"
      decimals="4"
      id="h_508_fa4557ae_c4fa_80fb_c4d8_cbeabd8e0161"
      unitRef="pure">0.030</oef:PctOfTotalInv>
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      contextRef="FY2026_C000006482Member"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2026_C000006483Member"
      id="t_364_aae5f6fd_ef61_a067_c7f3_0a3ee555e1db">MFS&#xae; High Income Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000006483Member"
      id="t_217_34262e03_13bb_45c1_8fc0_234bae0916a7">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000006483Member"
      id="t_218_f58cab39_2349_40aa_9228_6221b26f4f72">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000006483Member"
      id="t_219_326729f3_5126_4979_844e_6d74cd28a7a1">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000006483Member"
      id="t_221_870acdd1_89c9_4c15_b75a_79b4248857f8">funds.mfs.com</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000006483Member"
      id="t_222_90af31cc_2a7a_4625_a18c_b3d4734f48e9">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000006483Member"
      id="t_220_10d82d01_1fd9_4de8_a1d9_0260de85f7bc">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R3&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;88&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000006483Member"
      decimals="INF"
      id="h_498_c28ae727_ecf3_4175_8a30_1092e499c3f1"
      unitRef="USD">88</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006483Member"
      decimals="4"
      id="h_499_7876c108_b783_41cf_ab89_6339d9b67315"
      unitRef="pure">0.0085</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000006483Member"
      id="t_224_bf615913_78ab_4b53_b7b3_cb6d590b89f7">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R3 shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.67%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
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      contextRef="FY2026_C000006483Member"
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R3 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287285.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      contextRef="FY2026_C000006483Member"
      id="t_363_3140587f_db23_4d00_aac0_581a7991593a">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R3 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.67&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.80&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.42&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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    <oef:AvgAnnlRtrPct
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      id="h_500_8e75e3e6_ec8f_42cd_a0b5_45511ef3ed07"
      unitRef="pure">0.0767</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      id="h_502_07c39b79_4d83_4ace_923f_0c9b5ceed928"
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      id="t_366_6e5b7849_2792_2d6f_7a43_bc30372ec124">Bloomberg U.S. Aggregate Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      id="h_503_f4623959_20d7_44c1_8a9f_0c861c783cd9"
      unitRef="pure">0.0685</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_504_39a52041_65d0_4425_928f_0352c4c02b72"
      unitRef="pure">-0.0020</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_505_b9847ee6_4eec_474a_843b_2dcae440b97f"
      unitRef="pure">0.0188</oef:AvgAnnlRtrPct>
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      contextRef="FY2026_BloombergUSCorporateHighYield2IssuerCappedIndexMember"
      id="t_367_edefa95d_3315_2086_f455_b54f6fe7a387">Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_506_c6abd30e_d588_420f_9fd2_eb2546bad0e1"
      unitRef="pure">0.0770</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_BloombergUSCorporateHighYield2IssuerCappedIndexMember"
      decimals="4"
      id="h_507_7e6e6a66_9e7a_40d8_baaa_fb3ce9f98614"
      unitRef="pure">0.0454</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_508_eb1204b6_9e5d_4ada_892c_76d8516a8b9e"
      unitRef="pure">0.0675</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000006483Member"
      id="t_227_eb086e06_4cd4_48d8_b7e8_1ffec1e999ae">
&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r3&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000006483Member"
      id="t_228_a03723f1_3bdc_444f_ac1e_0baf8f070703">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R4&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;62&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.60&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000006472Member"
      decimals="INF"
      id="h_515_7b3ef594_5ae2_41ab_a687_c7199eaa79ae"
      unitRef="USD">62</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006472Member"
      decimals="4"
      id="h_516_a7038efb_d914_4f26_bf8f_cb870a1efb3b"
      unitRef="pure">0.0060</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000006472Member"
      id="t_237_acead1ab_8d69_4836_9cd4_36280ebae3f3">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R4 shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;7.93%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006472Member"
      id="t_238_60743da1_fa92_4ced_8fd7_5365b6eced19">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R4 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287379.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006472Member"
      id="t_364_0afe3c0c_8b9c_4c85_a485_9e1204690679">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006472Member"
      id="t_365_bba4a3f9_a1b1_4c90_8de4_868e394c3106">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006472Member"
      id="t_239_48b29f62_f8c2_4eaf_9a74_9456ad31c93c">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R4 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.12&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r4&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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      decimals="INF"
      id="h_526_b3e32c6a_6945_4205_acc4_1cccd06318c1"
      unitRef="USD">2001593093</us-gaap:AssetsNet>
    <oef:HoldingsCount
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      id="h_528_7bbf45bf_eddd_4fda_b1cd_58fdea6fe76d"
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      id="h_530_6383fe9b_6fe2_4846_9bb9_fabeced24bfd"
      unitRef="USD">8553745</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
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      id="h_531_6058cc67_7108_cecd_3a6d_fdb45a2b08f3"
      unitRef="pure">0.51</us-gaap:InvestmentCompanyPortfolioTurnover>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_FixedIncomeSecuritiesMember"
      decimals="4"
      id="h_532_f77cf3d4_be74_fb8c_1757_a9e2cbb6a404"
      unitRef="pure">0.970</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_MoneyMarketFundsMember"
      decimals="4"
      id="h_533_44a1553f_f0a3_de08_52e8_6c1e1e2a832c"
      unitRef="pure">0.030</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_EquityMember"
      decimals="4"
      id="h_534_9d3a58d9_f22d_4e3e_cf7d_f394c3339076"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_FitchBBBRatingMember"
      decimals="4"
      id="h_535_299a6f11_5a60_7b17_4ea6_291a56f96c08"
      unitRef="pure">0.004</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_FitchBBRatingMember"
      decimals="4"
      id="h_536_628411aa_5043_8ed2_8321_8f33a4e1c8e5"
      unitRef="pure">0.454</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_FitchBRatingMember"
      decimals="4"
      id="h_537_3e2fcaf9_38c8_6367_a982_a416b609c33d"
      unitRef="pure">0.384</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_FitchCCCRatingMember"
      decimals="4"
      id="h_538_300827a3_5ed8_11f5_ad94_46a529fd9731"
      unitRef="pure">0.110</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_FitchCCRatingMember"
      decimals="4"
      id="h_539_bbb80e22_7f8b_7962_c455_b4c14f69bb2e"
      unitRef="pure">0.003</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_NotRatedMember"
      decimals="4"
      id="h_540_943fa6ac_86a7_8493_b203_98eac4ea98cd"
      unitRef="pure">0.015</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_NonFixedIncomeMember"
      decimals="4"
      id="h_541_bc86b8d9_3a3c_5b92_3c09_30ef73b92cd6"
      unitRef="pure">0.000</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000006472Member_MoneyMarketFundsQualityMember"
      decimals="4"
      id="h_542_4fa61c2e_5567_f8c5_3381_1b38b484c17c"
      unitRef="pure">0.030</oef:PctOfTotalInv>
    <oef:CreditRatingsSelectionTextBlock
      contextRef="FY2026_C000006472Member"
      id="t_373_26ae8090_1786_12f7_d2b3_56dc16d72cad">
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2026_C000116932Member"
      id="t_374_1a88835e_6cff_7205_cfd7_4ce317801ec1">MFS&#xae; High Income Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000116932Member"
      id="t_243_ad671463_79e7_40f3_aa4a_c9246c512bcd">This annual shareholder report contains important information about MFS High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000116932Member"
      id="t_244_e99b7b60_6f2d_49e2_b8bd_35ef350719cf">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000116932Member"
      id="t_245_5edd5c17_349f_406b_acd4_94d408a2a037">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000116932Member"
      id="t_247_767f093b_0739_4139_b510_46f9656ea09e">funds.mfs.com</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000116932Member"
      id="t_248_2fec1ba2_8656_49b8_80b2_a11ac06ffb3c">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="FY2026_C000116932Member"
      id="t_246_76bd7716_ff25_44fe_8f37_488c47857978">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R6&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;52&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.50&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
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      id="h_532_43ee425b_3d93_4840_bdab_3f6b3d00fa9c"
      unitRef="USD">52</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      decimals="4"
      id="h_533_8cdb8942_a061_48ae_84e6_38272b74bf96"
      unitRef="pure">0.0050</oef:ExpenseRatioPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R6 shares of the MFS High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;8.04%&lt;/span&gt;, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;6.85%&lt;/span&gt; for the fund&#x2019;s benchmark, the Bloomberg U.S. Aggregate Bond Index. The fund's other benchmark, the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index, generated a return of &lt;span style="white-space: nowrap;"&gt;7.70%&lt;/span&gt;.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a quality perspective, security selection within CCC, BB and B-rated bonds benefited relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, favorable bond selection within the capital goods, consumer cyclicals, technology, and basic industry sectors strengthened relative returns.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;From a sector perspective, bond selection within the communications sector held back relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;During the reporting period, the fund's cash position weighed on relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R6 over a ten year period or since inception, if shorter, in comparison to (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests.&#160;&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287473.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
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      id="t_366_1918ea19_ebbd_49b9_84c3_7eb18fce9022">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000116932Member"
      id="t_367_236384b2_c3f7_47fa_83f0_aa707d7bfbe0">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of (i) a broad measure of market performance and (ii) an additional index that MFS believes more closely reflects the market segments in which the fund invests, over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R6 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;8.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.17&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;5.83&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Aggregate Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.85&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.20&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.88&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg U.S. Corporate High-Yield 2% Issuer Capped Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;7.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.54&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;6.75&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r6&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
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      id="t_254_2e01cd2b_cfac_4fa0_9139_730d8d0d91c9">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,001,593,093&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;3.4&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;367&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;2.7&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;8,553,745&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;51&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000116932Member"
      decimals="INF"
      id="h_543_3c468492_77a7_4b08_80d7_d20911e797bf"
      unitRef="USD">2001593093</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000116932Member"
      decimals="INF"
      id="h_545_2f24b748_8872_43f0_a34b_e4aafa6ca5b2"
      unitRef="Holding">367</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000116932Member"
      decimals="INF"
      id="h_547_fa6f38f0_ed4b_4a03_8e20_68668950cfb5"
      unitRef="USD">8553745</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000116932Member"
      decimals="4"
      id="h_548_c50b2a0c_36f6_4d97_9fec_07d807228f20"
      unitRef="pure">0.51</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000116932Member"
      id="t_372_8e48a1ae_2bd9_8392_3db9_4ea7a3f1cd13">
&lt;div style="font-weight: 400; font-family: 'Arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-top: 0; margin-bottom: 0; page-break-after: avoid;"&gt;
&lt;p style="font-family: 'Arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0 0 3pt 0;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/p&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'Arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-top: 6pt;"&gt;
&lt;p style="font-family: 'Arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0 3pt 0;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/p&gt;
&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income ~&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: right; font-size: 10pt; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'Arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-top: 6pt;"&gt;
&lt;p style="font-family: 'Arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0 3pt 0;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/p&gt;
&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;45.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;38.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;11.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;1.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;3.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000116932Member_FixedIncomeSecuritiesMember"
      decimals="4"
      id="h_549_f996cd13_586d_aa69_142a_a93e09865678"
      unitRef="pure">0.970</oef:PctOfTotalInv>
    <oef:PctOfTotalInv
      contextRef="TI20260131_C000116932Member_MoneyMarketFundsMember"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
</oef:CreditRatingsSelectionTextBlock>
    <oef:FundName
      contextRef="FY2026_C000006488Member"
      id="t_376_c8bea52b_108a_b2b4_d546_f46d8e62f77a">MFS&#xae; Municipal HighIncome Fund</oef:FundName>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="FY2026_C000006488Member"
      id="t_256_803b28bd_04ab_40c3_9295_a39ed0986451">This annual shareholder report contains important information about MFS Municipal High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000006488Member"
      id="t_257_32f53fd9_4b68_4b97_9c73_0e7aa3a96681">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="FY2026_C000006488Member"
      id="t_258_85289913_bb48_4978_9160_e729ed69a2ef">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000006488Member"
      id="t_260_ec1cf1e4_f1d7_442c_a8a5_f2dbed88dab4">funds.mfs.com</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="FY2026_C000006488Member"
      id="t_261_96ece7c7_cced_4ef2_904e_3b4c75ab6182">1&#x2011;800&#x2011;225&#x2011;2606</oef:AddlInfoPhoneNumber>
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      contextRef="FY2026_C000006488Member"
      id="t_259_16006848_8bca_4dc4_9b8a_1ce297cc977a">orderliterature@mfs.com</oef:AddlInfoEmail>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;67&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      id="h_549_85b186a6_0220_4305_81b9_afb4727dc8c9"
      unitRef="USD">67</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
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      id="h_550_b2c8f107_edb5_43e7_ab1c_7685de8debaa"
      unitRef="pure">0.0066</oef:ExpenseRatioPct>
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      id="t_263_60fbc415_ac50_49c9_9c96_cf2926a325e8">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class A shares of the MFS Municipal High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;3.79&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;4.70&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Municipal Bond Index.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December..&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The municipal bond market produced positive returns over the trailing year, particularly benefiting from positive performance over the second half of the period. Following a spike in April 2025, bond yield volatility generally trended lower, and the resumption of Fed rate cuts bolstered the outlook for fixed income assets, including municipals. The investment grade and high yield municipal markets delivered 4.7% and 2.7% returns, respectively, over the period. Bonds with maturities in the seven to 15-year range performed best while the longest maturity bonds lagged as the municipal yield curve steepened during the year. The yields (yield-to-worst) of the investment grade index and the high yield index ended the period at 3.45% and 5.52%, respectively, well above the five-year averages of 3.07% and 5.09%, respectively, a positive for income-oriented investors.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's longer duration stance benefited relative performance as interest rates generally declined during the reporting period.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Yield curve positioning detracted from relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's greater exposure to both the education and industrial revenue sectors held back relative returns. Security selection within AA and A-rated bonds further weakened relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class A over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance. This graph includes the deduction of the maximum applicable sales charge.&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287661.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006488Member"
      id="t_368_84adda2b_1a22_4ec0_a45b_f0e4e4105a34">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006488Member"
      id="t_369_a4bd4c6b_5e4d_4c4e_a3d8_fb45a89e478c">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006488Member"
      id="t_265_9b07cba5_1f05_4895_9726_4a7a3d72fe40">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;A without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.79&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.04&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;A with initial sales charge (4.25%)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.62&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.23&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.59&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Municipal Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
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    <oef:AvgAnnlRtrPct
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      decimals="4"
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      unitRef="pure">0.0379</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_552_7d854611_51c6_40d5_bec3_81ef89ebf0d2"
      unitRef="pure">0.0111</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_C000006488Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_553_5c91e83c_ba3d_4bd3_b240_5dd03c1a64d2"
      unitRef="pure">0.0304</oef:AvgAnnlRtrPct>
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      id="t_372_f910f33a_3849_58d5_3f63_bb6775b2c25b">A with initial sales charge (4.25%)</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_554_f0c26021_cad8_4a81_be57_1426b363ddc8"
      unitRef="pure">-0.0062</oef:AvgAnnlRtrPct>
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      decimals="4"
      id="h_555_aa3b684f_f0b0_4e4a_ab58_b82496743199"
      unitRef="pure">0.0023</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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      decimals="4"
      id="h_556_b831d2c2_124e_4104_a2b0_97d940af5891"
      unitRef="pure">0.0259</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
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      id="t_373_a9ccd902_f3d6_69fc_a31a_8042b5d50280">Bloomberg Municipal Bond Index</oef:LineGraphAndTableMeasureName>
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      decimals="4"
      id="h_557_a1ffafd8_7700_4959_ad2d_ff30849fbc1e"
      unitRef="pure">0.0470</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_558_265ea244_ee37_4f5c_a892_5aed2b9a6fbc"
      unitRef="pure">0.0086</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_559_30d1001b_a77e_46d8_88bd_d5d9ab5bb827"
      unitRef="pure">0.0232</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock
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      id="t_266_5e8fee54_1b32_4f36_8f69_d008b3a2fa91">
&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/a&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
    <oef:AddlFundStatisticsTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5,330,889,257&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;20.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,013&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;8.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;25,434,682&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000006488Member"
      decimals="INF"
      id="h_560_499c1277_ea95_4cb1_b471_18f742579c96"
      unitRef="USD">5330889257</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000006488Member"
      decimals="INF"
      id="h_562_1d258c29_d81a_41c2_9265_2fb587678aeb"
      unitRef="Holding">2013</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000006488Member"
      decimals="INF"
      id="h_564_f8371df8_e6a3_4972_bed7_25fc8d711395"
      unitRef="USD">25434682</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000006488Member"
      decimals="4"
      id="h_565_e769c225_ef25_4a01_bccd_1d3c5e4b79e4"
      unitRef="pure">0.09</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000006488Member"
      id="t_374_f3af0517_f27e_219f_76c6_65a31744842d">
&lt;div style="font-weight: 400; font-family: 'Arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-top: 0; margin-bottom: 0; page-break-after: avoid;"&gt;
&lt;p style="font-family: 'Arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0 0 3pt 0;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/p&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'Arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-top: 6pt; clear: both;"&gt;
&lt;p style="font-family: 'Arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0 3pt 0;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/p&gt;
&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'Arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-top: 6pt;"&gt;
&lt;p style="font-family: 'Arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0 3pt 0;"&gt;&lt;b&gt;Composition including fixed income credit &lt;br/&gt;quality&lt;/b&gt;&lt;/p&gt;
&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AAA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;14.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;19.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;34.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-weight: 400; font-family: 'Arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-top: 12pt;"&gt;
&lt;p style="font-family: 'Arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0 0 3pt 0;"&gt;&lt;b&gt;Industries&lt;/b&gt;&lt;/p&gt;
&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Long Term Care&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;15.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Hospitals&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Secondary Schools&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;8.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Miscellaneous Revenue - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;7.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Multi-Family Housing Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Airport Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Colleges&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Dormitories&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
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&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Sales &amp;amp; Excise Tax Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
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&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Tax - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Industries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;26.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;For purposes of these classifications, MFS uses its own internal sector/industry classification methodology, which may deviate from classification methodologies used by other industry participants (e.g., the Global Industry Classification Standard).&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;143&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.41&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class B shares of the MFS Municipal High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;3.03&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;4.70&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Municipal Bond Index.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December..&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The municipal bond market produced positive returns over the trailing year, particularly benefiting from positive performance over the second half of the period. Following a spike in April 2025, bond yield volatility generally trended lower, and the resumption of Fed rate cuts bolstered the outlook for fixed income assets, including municipals. The investment grade and high yield municipal markets delivered 4.7% and 2.7% returns, respectively, over the period. Bonds with maturities in the seven to 15-year range performed best while the longest maturity bonds lagged as the municipal yield curve steepened during the year. The yields (yield-to-worst) of the investment grade index and the high yield index ended the period at 3.45% and 5.52%, respectively, well above the five-year averages of 3.07% and 5.09%, respectively, a positive for income-oriented investors.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's longer duration stance benefited relative performance as interest rates generally declined during the reporting period.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Yield curve positioning detracted from relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's greater exposure to both the education and industrial revenue sectors held back relative returns. Security selection within AA and A-rated bonds further weakened relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
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    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006489Member"
      id="t_373_4491ece1_14ca_3a48_9cea_46017f28079b">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class B over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287755.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006489Member"
      id="t_370_66ab84ff_59fc_49b1_881f_a3fe0901a522">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006489Member"
      id="t_371_bc914b50_e0ad_4bb9_ae90_db3e34122f96">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
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      id="t_374_394f6042_eec2_1a28_6ec5_ad7e40aa762e">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;B without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.03&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.36&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;B with CDSC (declining over six years from 4% to 0%)&lt;sup style="font-size: smaller; vertical-align: super;"&gt;&#xd7;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;(0.95&lt;span&gt;)&lt;/span&gt;&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.27&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Municipal Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#xd7;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Assuming redemption at the end of the applicable period.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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      id="h_600_2920c1f5_7660_42dd_b668_3e2e9a0e673a"
      unitRef="pure">0.0086</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/b&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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    <oef:AddlFundStatisticsTextBlock
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5,330,889,257&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;20.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,013&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;8.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;25,434,682&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000006489Member"
      decimals="INF"
      id="h_602_4460bff2_3b65_403f_ba91_0f1c282ba407"
      unitRef="USD">5330889257</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000006489Member"
      decimals="INF"
      id="h_604_25e2575e_a7d4_4f8b_ac2a_deb4e970231a"
      unitRef="Holding">2013</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000006489Member"
      decimals="INF"
      id="h_606_b19f37c2_5cbc_4b16_95aa_95cd40c3c7ee"
      unitRef="USD">25434682</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000006489Member"
      decimals="4"
      id="h_607_8a7dba1a_6405_4d0c_bbc5_048653a35764"
      unitRef="pure">0.09</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
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      id="t_281_eb94e505_48fe_44db_ac5d_92293d002230">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AAA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;14.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;19.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;34.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Industries&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Long Term Care&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;15.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Hospitals&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Secondary Schools&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;8.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Miscellaneous Revenue - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;7.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Multi-Family Housing Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Airport Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Colleges&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Dormitories&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Sales &amp;amp; Excise Tax Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Tax - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Industries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;26.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;For purposes of these classifications, MFS uses its own internal sector/industry classification methodology, which may deviate from classification methodologies used by other industry participants (e.g., the Global Industry Classification Standard).&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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      contextRef="FY2026_C000006490Member"
      id="t_282_e627e554_a42d_4ead_9dbf_bc7c860b8592">This annual shareholder report contains important information about MFS Municipal High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      id="t_284_2a27a57b_0a18_43b9_94ec_34feea5ec5df">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;C&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;168&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;1.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="FY2026_C000006490Member"
      decimals="INF"
      id="h_633_5b8cace1_f833_4e3f_8c5c_9b6cb22c0002"
      unitRef="USD">168</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="FY2026_C000006490Member"
      decimals="4"
      id="h_634_c35e6e76_0590_42e8_a5d9_7ec86bc8dcac"
      unitRef="pure">0.0166</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock
      contextRef="FY2026_C000006490Member"
      id="t_289_b34cd216_4e28_4bfc_a51a_c0d3e97a4194">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class C shares of the MFS Municipal High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;2.77&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;4.70&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Municipal Bond Index.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December..&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The municipal bond market produced positive returns over the trailing year, particularly benefiting from positive performance over the second half of the period. Following a spike in April 2025, bond yield volatility generally trended lower, and the resumption of Fed rate cuts bolstered the outlook for fixed income assets, including municipals. The investment grade and high yield municipal markets delivered 4.7% and 2.7% returns, respectively, over the period. Bonds with maturities in the seven to 15-year range performed best while the longest maturity bonds lagged as the municipal yield curve steepened during the year. The yields (yield-to-worst) of the investment grade index and the high yield index ended the period at 3.45% and 5.52%, respectively, well above the five-year averages of 3.07% and 5.09%, respectively, a positive for income-oriented investors.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's longer duration stance benefited relative performance as interest rates generally declined during the reporting period.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Yield curve positioning detracted from relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's greater exposure to both the education and industrial revenue sectors held back relative returns. Security selection within AA and A-rated bonds further weakened relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000006490Member"
      id="t_290_44efa296_8472_4e81_8fe1_9cbcaed218fa">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class C over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287849.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000006490Member"
      id="t_372_771665ea_4f41_4827_9b90_7c4989c95f05">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000006490Member"
      id="t_373_807c958c_ece8_4777_97b3_fc4ca495962d">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000006490Member"
      id="t_377_09c6c5f6_318d_ab9d_bfc2_6d99e7120d52">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;C without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;C with CDSC (1% for 12 months)&lt;sup style="font-size: smaller; vertical-align: super;"&gt;&#xd7;&lt;/sup&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.77&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.11&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Municipal Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#xd7;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Assuming redemption at the end of the applicable period.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

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&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/c&lt;/span&gt; for more recent performance information.&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5,330,889,257&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;20.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,013&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;8.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;25,434,682&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
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    <oef:HoldingsCount
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AAA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;14.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;19.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;34.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Industries&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Long Term Care&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;15.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Hospitals&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Secondary Schools&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;8.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Miscellaneous Revenue - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;7.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Multi-Family Housing Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Airport Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Colleges&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Dormitories&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Sales &amp;amp; Excise Tax Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Tax - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Industries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;26.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;For purposes of these classifications, MFS uses its own internal sector/industry classification methodology, which may deviate from classification methodologies used by other industry participants (e.g., the Global Industry Classification Standard).&lt;/div&gt;
</oef:HoldingsTableTextBlock>
    <oef:PctOfTotalInv
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      unitRef="pure">0.975</oef:PctOfTotalInv>
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      id="h_651_70cd0ab7_f142_4833_b7d2_979e20501db2"
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      id="h_653_4ad7f2c1_53ce_4d03_bf4e_60192c29dd11"
      unitRef="pure">0.009</oef:PctOfTotalInv>
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      decimals="4"
      id="h_654_318e4495_a54f_4235_a8e9_2ff394276c84"
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      id="h_655_3df0146e_337a_482c_87fd_c4f458ab8018"
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      id="h_657_a32cbd7d_6b42_48f5_879b_2c9014a8beef"
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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    <oef:FundName
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      id="t_380_a0018415_ed67_2548_a5e5_9a66bed1ef66">MFS&#xae; Municipal HighIncome Fund</oef:FundName>
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      contextRef="FY2026_C000103072Member"
      id="t_295_7130db1f_b59b_4d1f_b0aa_73987edabb8d">This annual shareholder report contains important information about MFS Municipal High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="FY2026_C000103072Member"
      id="t_296_4e15ee0c_88a0_4bca_952b_642e385138d0">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
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      id="t_297_b2004e86_bb55_4aaf_a76c_9deb71022739">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="FY2026_C000103072Member"
      id="t_299_4e435e8f_69fa_441e_935c_c8da9626ad89">funds.mfs.com</oef:AddlInfoWebsite>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;I&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;67&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.66&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:ExpensesTextBlock>
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      unitRef="USD">67</oef:ExpensesPaidAmt>
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      id="h_676_dab4273a_409a_4528_975f_c9e030594da1"
      unitRef="pure">0.0066</oef:ExpenseRatioPct>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class I shares of the MFS Municipal High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;3.64&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;4.70&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Municipal Bond Index.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December..&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The municipal bond market produced positive returns over the trailing year, particularly benefiting from positive performance over the second half of the period. Following a spike in April 2025, bond yield volatility generally trended lower, and the resumption of Fed rate cuts bolstered the outlook for fixed income assets, including municipals. The investment grade and high yield municipal markets delivered 4.7% and 2.7% returns, respectively, over the period. Bonds with maturities in the seven to 15-year range performed best while the longest maturity bonds lagged as the municipal yield curve steepened during the year. The yields (yield-to-worst) of the investment grade index and the high yield index ended the period at 3.45% and 5.52%, respectively, well above the five-year averages of 3.07% and 5.09%, respectively, a positive for income-oriented investors.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's longer duration stance benefited relative performance as interest rates generally declined during the reporting period.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Yield curve positioning detracted from relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's greater exposure to both the education and industrial revenue sectors held back relative returns. Security selection within AA and A-rated bonds further weakened relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class I over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2287943.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
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      id="t_374_da2d7c1e_0b8b_4235_8ae9_91e260da974e">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
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      contextRef="FY2026_C000103072Member"
      id="t_375_23321812_baf3_4e2a_ba82_b0a72456c9cb">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
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      contextRef="FY2026_C000103072Member"
      id="t_304_65455c23_dd9a_4fba_9354_ecf117b3dfa5">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;10-yr&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;I without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.64&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.08&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.02&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Municipal Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.32&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_C000103072Member_WithoutSalesLoadMember"
      id="t_378_94c0e3e2_f9f6_c32f_5e4a_775d7b9c1e6f">I without sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_C000103072Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_677_f53e8d08_bb34_4d52_9e9a_7b51348e56bd"
      unitRef="pure">0.0364</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_C000103072Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_678_61accee5_a2ea_43be_a3ed_be7f0ece5692"
      unitRef="pure">0.0108</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_C000103072Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_679_bd53c2b1_00f5_490f_aba6_50d46be2bce0"
      unitRef="pure">0.0302</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_BloombergMunicipalBondIndexMember"
      id="t_379_8628895d_b451_b0ae_eb48_569d0ce4b5cf">Bloomberg Municipal Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_680_2e8c9e9a_bd1b_4048_99ee_19e286c15f3b"
      unitRef="pure">0.0470</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_681_a8e05580_7fa7_4576_bb32_8a199538b778"
      unitRef="pure">0.0086</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="TenY2026_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_682_fa21ed25_2d1c_48a9_ba22_27fa06891c50"
      unitRef="pure">0.0232</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000103072Member"
      id="t_305_b1ad7b5f_f8e2_4908_b202_bf213c8e5286">
&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/i&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000103072Member"
      id="t_306_0811928a_f36b_4a2e_be04_206c58ee2423">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5,330,889,257&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;20.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,013&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;8.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;25,434,682&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000103072Member"
      decimals="INF"
      id="h_683_7020a829_aea2_4ad6_8e14_553f0b0f4e15"
      unitRef="USD">5330889257</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000103072Member"
      decimals="INF"
      id="h_685_687a23cf_0825_4d51_acb7_5a49bf2d2322"
      unitRef="Holding">2013</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000103072Member"
      decimals="INF"
      id="h_687_434bae79_f2ca_4bd3_ab9f_db2a18b9312e"
      unitRef="USD">25434682</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000103072Member"
      decimals="4"
      id="h_688_30da9ff1_8b1a_4ecb_b4a2_233e3f2b29e3"
      unitRef="pure">0.09</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000103072Member"
      id="t_307_b58df753_b887_4bf6_9be1_4d7f36b60511">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AAA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;14.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;19.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;34.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Industries&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Long Term Care&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;15.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Hospitals&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Secondary Schools&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;8.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Miscellaneous Revenue - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;7.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Multi-Family Housing Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Airport Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Colleges&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Dormitories&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Sales &amp;amp; Excise Tax Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Tax - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Industries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;26.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;For purposes of these classifications, MFS uses its own internal sector/industry classification methodology, which may deviate from classification methodologies used by other industry participants (e.g., the Global Industry Classification Standard).&lt;/div&gt;
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&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;
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      id="t_308_0a0ad033_5e40_4a4c_aed8_a83fc578ae85">This annual shareholder report contains important information about MFS Municipal High Income Fund for the period of February 1, 2025 to January 31, 2026.</oef:AnnlOrSemiAnnlStatementTextBlock>
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      id="t_310_10f664ed_bcb8_4cae_9519_4daf9c028034">You can find additional information about the fund at &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-weight: normal; font-size: 11pt;"&gt;funds.mfs.com&lt;/span&gt;. You can also request this information by contacting us at 1&#x2011;800&#x2011;225&#x2011;2606 or by sending an e-mail request to orderliterature@mfs.com.</oef:AddlInfoTextBlock>
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND EXPENSES&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(126, 45, 64); font-size: 12pt; text-align: left; margin: 0px 0px 6pt 0px;"&gt;What were the fund costs for the last year?&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; vertical-align: bottom; font-style: italic; font-size: 10pt; text-align: center; color: rgb(0, 0, 0); width: 533pt; position: absolute; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 2pt 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-after: avoid; break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Class Name&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; font-weight: normal; text-align: center; vertical-align: middle; border-right-color: initial; border-right-style: none; border-right-width: initial; padding: 0 3pt 0 3pt;"&gt;Costs&#160;paid as a percentage of&#160;a&#160;$10,000&#160;investment&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-weight: normal; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;R6&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;&lt;span style="float: none;"&gt;$&lt;/span&gt;58&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; white-space: nowrap; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: center; vertical-align: middle; padding: 0 3pt 0 3pt;"&gt;0.57&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
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&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 10pt 0px 3pt 0px;"&gt;MANAGEMENT'S DISCUSSION OF FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -2pt; margin-bottom: 0px; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;For the twelve months ended January 31, 2026, Class R6 shares of the MFS Municipal High Income Fund (fund) provided a total return of &lt;span style="white-space: nowrap;"&gt;3.86&lt;/span&gt;%, at net asset value. This compares with a return of &lt;span style="white-space: nowrap;"&gt;4.70&lt;/span&gt;% for the fund&#x2019;s benchmark, the Bloomberg Municipal Bond Index.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Global equity markets reached record levels during the period, withstanding considerable volatility amid tariffs, geopolitical conflict and high levels of uncertainty. In the US, a pro-growth tax and spending bill was signed into law, while in Europe, renewed focus on defense and infrastructure spending brightened the outlook. In Japan, the election of a pro-growth prime minister sent stocks to new highs. Optimism over artificial intelligence remained quite high.&#160;&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Considerable progress was made in trade talks between the US and many major trading partners, with a fragile truce between the US and China extended through late 2026. US tariffs remained high on goods from countries such as India and Brazil.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Moderating inflation pressures allowed many global central banks to ease monetary policy during the period. Amid a difficult policymaking environment and slower job growth, the Federal Reserve resumed easing policy in September and delivered quarter-point rate cuts in October and December..&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;In fixed income markets, global bond yields peaked near the start of the reporting period, then gradually declined, ending the reporting period marginally lower than at the start of the period,&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;while experiencing&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;waves of volatility in between. Both credit spreads and US bond market volatility (as measured by the Merrill Lynch Option Volatility Estimate (MOVE) Index), ended near session lows after rising&lt;span style="white-space: nowrap;"&gt;&#160;&lt;/span&gt;in April and May due to tariff concerns.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The municipal bond market produced positive returns over the trailing year, particularly benefiting from positive performance over the second half of the period. Following a spike in April 2025, bond yield volatility generally trended lower, and the resumption of Fed rate cuts bolstered the outlook for fixed income assets, including municipals. The investment grade and high yield municipal markets delivered 4.7% and 2.7% returns, respectively, over the period. Bonds with maturities in the seven to 15-year range performed best while the longest maturity bonds lagged as the municipal yield curve steepened during the year. The yields (yield-to-worst) of the investment grade index and the high yield index ended the period at 3.45% and 5.52%, respectively, well above the five-year averages of 3.07% and 5.09%, respectively, a positive for income-oriented investors.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top contributors to performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's longer duration stance benefited relative performance as interest rates generally declined during the reporting period.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); break-inside: avoid; margin-top: -1pt; border: 1pt solid rgb(128, 128, 128);"&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: -4pt 0 5pt 0;"&gt;
&lt;li style="font-weight: 400; padding-left: 2pt; margin-top: 6pt; margin-left: 16pt; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: disc; font-size: 10pt; line-height: 11pt; padding-right: 6pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Top detractors from performance relative to the Bloomberg Municipal Bond Index:&lt;/div&gt;
&lt;ul style="break-inside: avoid; padding: 0; margin: 0;"&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;Yield curve positioning detracted from relative performance.&lt;/div&gt;
&lt;/li&gt;
&lt;li style="font-weight: 400; font-family: 'Arial'; color: rgb(0, 0, 0); list-style-type: circle; font-size: 10pt; line-height: 11pt; padding-right: 6pt; padding-left: 0; margin-left: 16pt;"&gt;
&lt;div style="font-weight: 400; font-family: 'arial'; color: rgb(0, 0, 0); font-size: 10pt; line-height: 11pt; margin: 0px;"&gt;The fund's greater exposure to both the education and industrial revenue sectors held back relative returns. Security selection within AA and A-rated bonds further weakened relative results.&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock
      contextRef="FY2026_C000191232Member"
      id="t_316_0e243479_fc25_429f_a789_5ba08255fcad">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND PERFORMANCE&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;&lt;b&gt; &lt;i&gt;The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance. &lt;/i&gt; &lt;/b&gt;The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The graph and table below assume reinvestment of dividends and capital gain distributions.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Growth of a Hypothetical $10,000 Investment*&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This graph shows the performance of a hypothetical $10,000 investment in Class R6 over a ten year period or since inception, if shorter, in comparison to a broad measure of market performance.&lt;/div&gt;

&lt;div style="font-weight: 400; font-family: 'arial'; font-size: 9pt; color: rgb(0, 0, 0); margin-bottom: 20pt;"&gt;&lt;img alt="Fund Performance - Growth of 10K" src="chartimages_2288037.jpg" style="display: block; width: 540pt; margin-right: auto; margin-left: auto;"/&gt; &lt;/div&gt;
*For the period from the commencement of the class's investment operations, June 2, 2017 through January 31, 2026.</oef:LineGraphTableTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture
      contextRef="FY2026_C000191232Member"
      id="t_376_824913d5_9c74_4438_b81b_297b49d5ddb2">The fund&#x2019;s past performance is not a good predictor of the fund&#x2019;s future performance.</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock
      contextRef="FY2026_C000191232Member"
      id="t_377_e0be32f4_3b41_45ff_8df3_0ff5ce60a8eb">The graph and table below do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares.</oef:NoDeductionOfTaxesTextBlock>
    <oef:AvgAnnlRtrTableTextBlock
      contextRef="FY2026_C000191232Member"
      id="t_317_d6aece4e_42f6_4388_ab3f_6d03a579b0df">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;Average Annual Total Returns through 1/31/26&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;This table shows the average annual total returns of the class of shares noted for the periods shown, both with (if any) and without sales charges. It also shows the average annual total returns of a broad measure of market performance over the same periods.&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;1-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5-yr&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;Life*&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;R6 without sales charge&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;3.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;1.16&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.93&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; font-weight: bold; color: rgb(0, 0, 0); border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; font-size: 10pt; text-align: left; padding: 0 3pt 0 3pt;"&gt;Comparative Benchmark(s)&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-size: 9pt; font-family: 'Arial'; color: rgb(0, 0, 0); vertical-align: middle; text-align: right; border-right-color: initial; border-right-style: none; border-right-width: initial; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: rgb(128, 128, 128); border-top-style: solid; border-top-width: 1pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: left; border-left-color: rgb(128, 128, 128); border-left-style: solid; border-left-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;Bloomberg Municipal Bond Index &#x2206;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;4.70&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;0.86&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; text-align: right; white-space: nowrap; border-right-color: rgb(128, 128, 128); border-right-style: solid; border-right-width: 1pt; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; padding: 0 3pt 0 3pt;"&gt;2.34&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;table style="table-layout: auto; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid; width: auto; margin-bottom: 10pt;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;*&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;For the period from the commencement of the class's investment operations, June 2, 2017 through January 31, 2026.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; font-size: 8pt; font-style: normal; height: auto; border: initial none initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 6pt; font-weight: normal; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: left; vertical-align: top; width: 18pt; padding: 0;"&gt;
&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; vertical-align: super; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;&#x2206;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 7.5pt; border-right-color: initial; border-right-style: none; border-right-width: initial; text-align: left; vertical-align: top; padding: 0 0 0 5pt;"&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;"&gt;Source: FactSet Research Systems Inc.&lt;/div&gt;

&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;
</oef:AvgAnnlRtrTableTextBlock>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_C000191232Member_WithoutSalesLoadMember"
      id="t_379_eb0e632a_953d_13a6_cdf6_d0cbaf8f8e46">R6 without sales charge</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_C000191232Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_716_d7555837_9c6c_4e14_9150_7f8e68af542f"
      unitRef="pure">0.0386</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_C000191232Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_717_75d6f8bf_a58c_4550_8d70_450cbb46b2e1"
      unitRef="pure">0.0116</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20170602_20260131_C000191232Member_WithoutSalesLoadMember"
      decimals="4"
      id="h_718_56322b27_6c2f_4b43_a6c9_e39fa5a3b954"
      unitRef="pure">0.0293</oef:AvgAnnlRtrPct>
    <oef:LineGraphAndTableMeasureName
      contextRef="FY2026_BloombergMunicipalBondIndexMember"
      id="t_380_db383df1_7d62_b573_98b8_67a76f3f3ee8">Bloomberg Municipal Bond Index</oef:LineGraphAndTableMeasureName>
    <oef:AvgAnnlRtrPct
      contextRef="FY2026_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_719_768ee8d0_382b_4473_b56a_44eeec6c1665"
      unitRef="pure">0.0470</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="FiveY2026_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_720_20a9af2a_053b_456e_aba3_f291afde6af5"
      unitRef="pure">0.0086</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="D20170602_20260131_BloombergMunicipalBondIndexMember"
      decimals="4"
      id="h_721_8800455f_f225_427c_a4f4_2aaf594d667b"
      unitRef="pure">0.0234</oef:AvgAnnlRtrPct>
    <oef:PerfInceptionDate
      contextRef="FY2026_C000191232Member"
      id="t_383_a80f1e9e_854d_35c1_6825_0f33a7cbae6d">2017-06-02</oef:PerfInceptionDate>
    <oef:UpdPerfInfoLocationTextBlock
      contextRef="FY2026_C000191232Member"
      id="t_318_ee3c3d4f_c30b_4219_9fc7_98d22ec86e2e">
&lt;div style="font-family: 'arial'; font-size: 11pt; font-weight: normal; color: rgb(0, 0, 0); margin: 0px 0px 10pt 0px;"&gt;Visit &lt;span style="text-decoration-line: underline; color: rgb(45, 126, 201); font-family: 'arial'; font-size: 11pt; font-weight: normal;"&gt;mfs.com/perf/r6&lt;/span&gt; for more recent performance information.&lt;/div&gt;
</oef:UpdPerfInfoLocationTextBlock>
    <oef:AddlFundStatisticsTextBlock
      contextRef="FY2026_C000191232Member"
      id="t_319_756d9d87_27d8_4282_9583_85370975fa41">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;FUND STATISTICS AS OF 1/31/26&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Net Assets ($):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;5,330,889,257&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Maturity (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;20.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Number of Holdings:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;2,013&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; padding: 0 3pt 0 3pt;"&gt;Average Effective Duration (yrs):&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; padding: 0 3pt 0 3pt;"&gt;8.5&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Total Management Fee ($)#:&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;25,434,682&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-top-color: initial; border-top-style: none; border-top-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial;"&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); text-align: left; font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; padding: 0 3pt 0 3pt;"&gt;Portfolio Turnover Rate (%):&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 72pt; text-align: right; padding: 0 3pt 0 3pt;"&gt;9&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-weight: bold; text-align: left; font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: auto; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; border-left-color: initial; border-left-style: none; border-left-width: initial; width: 178pt; font-weight: normal; text-align: left; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; page-break-inside: avoid; vertical-align: middle; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 9pt; width: 72pt; font-weight: normal; text-align: right; border-left-color: initial; border-left-style: none; border-left-width: initial; border-bottom-color: initial; border-bottom-style: none; border-bottom-width: initial; padding: 0 3pt 0 3pt;"&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;&lt;i&gt;# &lt;/i&gt; Includes the effect of any management fee waivers, if applicable.&lt;/div&gt;

&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Where the fund holds derivatives, they are not included in the total number of portfolio holdings.&lt;/div&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20260131_C000191232Member"
      decimals="INF"
      id="h_722_1eb27885_587c_48b6_9181_2c86010457dd"
      unitRef="USD">5330889257</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20260131_C000191232Member"
      decimals="INF"
      id="h_724_092505c6_89bf_4e2a_9fab_e29800467d88"
      unitRef="Holding">2013</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="FY2026_C000191232Member"
      decimals="INF"
      id="h_726_2ec1b3ec_f03a_41d8_9a2f_6f0b509ae427"
      unitRef="USD">25434682</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="FY2026_C000191232Member"
      decimals="4"
      id="h_727_5d5eefb3_892c_4f1f_a40b_292f0eac65b4"
      unitRef="pure">0.09</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="FY2026_C000191232Member"
      id="t_320_f05d5603_0017_453d_8956_c91902ff9377">
&lt;div style="font-family: 'arial'; font-size: 11.52pt; font-weight: bold; color: rgb(126, 45, 64); margin: 0px 0px 3pt 0px;"&gt;PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 1/31/26)&lt;/div&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Portfolio structure&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; page-break-inside: avoid; break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;97.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; padding: 2pt 3pt 2pt 3pt;"&gt;Equities&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; width: 50pt; white-space: nowrap; padding: 2pt 3pt 2pt 3pt;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 12pt 0px 3pt 0px;"&gt;&lt;b&gt;Composition including fixed income credit&lt;br/&gt;quality&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AAA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;AA&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;A&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;14.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BBB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;19.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;BB&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;B&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CCC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;CC&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;1.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Not Rated&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;34.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Non-Fixed Income&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;0.0&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: left; vertical-align: bottom; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Money Market Funds&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;2.5&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;

&lt;div style="font-family: 'arial'; color: rgb(0, 0, 0); letter-spacing: normal; font-size: 10pt; text-align: left; font-weight: bold; margin: 0px 0px 3pt 0px;"&gt;&lt;b&gt;Industries&lt;/b&gt;&lt;/div&gt;

&lt;table style="table-layout: auto; width: 100%; border-collapse: collapse; break-inside: avoid-page; page-break-inside: avoid;"&gt;

&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt; border-top-color: initial; border-top-style: none; border-top-width: initial;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Long Term Care&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;15.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Healthcare Revenue - Hospitals&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;12.3&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Secondary Schools&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;8.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Miscellaneous Revenue - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;7.1&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Multi-Family Housing Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Airport Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;6.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
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&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Colleges&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.9&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
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&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Universities - Dormitories&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.8&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
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&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Sales &amp;amp; Excise Tax Revenue&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.6&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Tax - Other&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;3.2&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr style="break-inside: avoid-page; page-break-inside: avoid; height: 16pt; border-bottom-color: rgb(128, 128, 128); border-bottom-style: solid; border-bottom-width: 1pt;"&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; vertical-align: bottom; text-align: left; width: auto; padding: 2pt 2pt 2pt 3pt;"&gt;Other Industries&lt;/td&gt;
&lt;td style="font-weight: 400; break-inside: avoid-page; page-break-inside: avoid; font-family: 'Arial'; color: rgb(0, 0, 0); font-size: 10pt; text-align: right; vertical-align: bottom; white-space: nowrap; width: 45pt; padding: 2pt 3pt 2pt 0;"&gt;26.4&lt;span&gt;%&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;

&lt;/table&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;Ratings are assigned using Moody&#x2019;s, Fitch, and Standard &amp;amp; Poor&#x2019;s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&amp;amp;P and Fitch scale (e.g., AAA). All ratings are subject to change.&lt;/div&gt;


&lt;div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-size: 8pt; margin: 0px 0px 6pt 0px;"&gt;For purposes of these classifications, MFS uses its own internal sector/industry classification methodology, which may deviate from classification methodologies used by other industry participants (e.g., the Global Industry Classification Standard).&lt;/div&gt;
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        <link:footnote id="f_0011_000015" xlink:label="f_0011_000015" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Expenses are direct expenses and do not include underlying fund fees and expenses.</link:footnote>
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        <link:footnote id="f_0011_000017" xlink:label="f_0011_000017" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: FactSet Research Systems Inc.</link:footnote>
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        <link:footnote id="f_0013_000015" xlink:label="f_0013_000015" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0015_000017" xlink:label="f_0015_000017" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0015_000020" xlink:label="f_0015_000020" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0017_000021" xlink:label="f_0017_000021" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Expenses are direct expenses and do not include underlying fund fees and expenses.</link:footnote>
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        <link:footnote id="f_0017_000019" xlink:label="f_0017_000019" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0017_000022" xlink:label="f_0017_000022" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0019_000021" xlink:label="f_0019_000021" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0019_000022" xlink:label="f_0019_000022" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund does not pay a management fee.</link:footnote>
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        <link:footnote id="f_0019_000023" xlink:label="f_0019_000023" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0021_000023" xlink:label="f_0021_000023" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0021_000024" xlink:label="f_0021_000024" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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        <link:footnote id="f_0021_000025" xlink:label="f_0021_000025" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0023_000026" xlink:label="f_0023_000026" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</xhtml:div></link:footnote>
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        <link:footnote id="f_0023_000025" xlink:label="f_0023_000025" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0023_000027" xlink:label="f_0023_000027" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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        <link:footnote id="f_0023_000028" xlink:label="f_0023_000028" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0025_000002" xlink:label="f_0025_000002" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Assuming redemption at the end of the applicable period.</link:footnote>
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        <link:footnote id="f_0025_000001" xlink:label="f_0025_000001" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: FactSet Research Systems Inc.</link:footnote>
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        <link:loc
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        <link:footnote id="f_0003_000001" xlink:label="f_0003_000001" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Expenses are direct expenses and do not include underlying fund fees and expenses.</link:footnote>
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        <link:footnote id="f_0025_000004" xlink:label="f_0025_000004" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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          xlink:href="#h_447_004bc811_da12_f1c5_4625_b2652ad11fa0"
          xlink:label="h_447_004bc811_da12_f1c5_4625_b2652ad11fa0"
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        <link:footnote id="f_0025_000003" xlink:label="f_0025_000003" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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          xlink:href="#h_45_7f686159_b3f5_4f44_944f_8ce5f0d00e5f"
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        <link:loc
          xlink:href="#h_452_eb02a12a_06cb_44aa_aead_4688a7d3f1b9"
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        <link:footnote id="f_0027_000001" xlink:label="f_0027_000001" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: FactSet Research Systems Inc.</link:footnote>
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        <link:loc
          xlink:href="#h_454_1a63aaad_0064_4173_8b3c_13a8faab22e5"
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        <link:loc
          xlink:href="#h_455_efa24b10_e3e4_482d_96fe_3d2eec315b49"
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        <link:footnoteArc
          xlink:arcrole="http://www.xbrl.org/2003/arcrole/fact-footnote"
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        <link:loc
          xlink:href="#h_456_3210fadf_6c40_4036_b684_e0a78472e56c"
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        <link:footnoteArc
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          xlink:from="h_456_3210fadf_6c40_4036_b684_e0a78472e56c"
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        <link:footnote id="f_0027_000002" xlink:label="f_0027_000002" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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        <link:footnote id="f_0027_000003" xlink:label="f_0027_000003" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0029_000001" xlink:label="f_0029_000001" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: FactSet Research Systems Inc.</link:footnote>
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        <link:footnote id="f_0029_000002" xlink:label="f_0029_000002" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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        <link:footnote id="f_0029_000003" xlink:label="f_0029_000003" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0031_000001" xlink:label="f_0031_000001" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: FactSet Research Systems Inc.</link:footnote>
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        <link:footnote id="f_0003_000003" xlink:label="f_0003_000003" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Assuming redemption at the end of the applicable period.</link:footnote>
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          xlink:from="h_49_626b89d9_4ea4_4bd3_bb1d_3e9824bee2e7"
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          xlink:from="h_490_4ea009d9_d3f9_4587_b64e_fc068ead47a2"
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        <link:loc
          xlink:href="#h_491_f1258923_33a0_434d_bfd7_867567df60ff"
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        <link:footnoteArc
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        <link:loc
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        <link:footnote id="f_0031_000002" xlink:label="f_0031_000002" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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          xlink:from="h_496_3a839ba1_209d_4b0e_b312_8a56eff46491"
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        <link:footnote id="f_0031_000003" xlink:label="f_0031_000003" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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          xlink:from="h_498_3701d61d_5f9c_f27f_f4b8_9b28393ad2a1"
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        <link:loc
          xlink:href="#h_50_3202826e_1409_4bc7_81ac_abd9c2bae96b"
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        <link:footnoteArc
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        <link:loc
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        <link:footnote id="f_0033_000037" xlink:label="f_0033_000037" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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          xlink:from="h_503_f4623959_20d7_44c1_8a9f_0c861c783cd9"
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        <link:loc
          xlink:href="#h_504_39a52041_65d0_4425_928f_0352c4c02b72"
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        <link:loc
          xlink:href="#h_505_b9847ee6_4eec_474a_843b_2dcae440b97f"
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        <link:loc
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        <link:loc
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        <link:loc
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        <link:footnote id="f_0033_000038" xlink:label="f_0033_000038" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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        <link:loc
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        <link:footnote id="f_0033_000039" xlink:label="f_0033_000039" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0003_000002" xlink:label="f_0003_000002" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: FactSet Research Systems Inc.</link:footnote>
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        <link:footnote id="f_0035_000039" xlink:label="f_0035_000039" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0039_000043" xlink:label="f_0039_000043" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0039_000044" xlink:label="f_0039_000044" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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        <link:footnote id="f_0041_000046" xlink:label="f_0041_000046" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Assuming redemption at the end of the applicable period.</xhtml:div></link:footnote>
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        <link:footnote id="f_0041_000045" xlink:label="f_0041_000045" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US"><xhtml:div style="font-family: 'arial'; font-weight: normal; color: rgb(0, 0, 0); font-style: normal; font-size: 8pt; margin: 3pt 0px 0px 0px;">Source: FactSet Research Systems Inc.</xhtml:div></link:footnote>
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        <link:footnote id="f_0003_000004" xlink:label="f_0003_000004" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Includes the effect of any management fee waivers, if applicable.</link:footnote>
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        <link:footnote id="f_0003_000005" xlink:label="f_0003_000005" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.</link:footnote>
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        <link:footnote id="f_0043_000053" xlink:label="f_0043_000053" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Source: FactSet Research Systems Inc.</link:footnote>
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