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      id="Fact000014">&lt;p id="xdx_A84_eoef--SupplementToProspectusTextBlock_zLaEWTnIs68h" style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Supplement to each of the Summary Prospectus and
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&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;Statutory Prospectus, dated &lt;span id="xdx_902_eoef--ProspectusDate_c20260910__20260910_z6WLCH5JSIV"&gt;December 23, 2025&lt;/span&gt;, &lt;/b&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"&gt;&lt;b&gt;as previously supplemented&lt;/b&gt;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;&#160;&lt;/b&gt;&lt;/p&gt;

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&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following revisions will become effective as of
September 21, 2026. Each revision is to the relevant subsection under the heading &#x201c;Principal Investment Strategies - The Index.&#x201d;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&lt;b&gt;&#160;&lt;/b&gt;&lt;/p&gt;

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    <oef:ProspectusDate contextRef="AsOf2026-09-10" id="Fact000015">2025-12-23</oef:ProspectusDate>
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      id="Fact000016">&lt;p id="xdx_A89_eoef--StrategyNarrativeTextBlock_zBeS2LIBOBc1" style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following revisions are made under the heading
&#x201c;&lt;b&gt;I. Eligible Universe&lt;/b&gt;,&#x201d; with respect to the following Sub-Themes:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-align: justify"&gt;1. &#160;&#160;&#160;&#160;&#160;&#160;&#160;&lt;i&gt;Power
Generation and Electric Grid Equipment&lt;/i&gt;. The second bullet is deleted and replaced with the following:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.5in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify; padding-right: 0.5in"&gt;production of industrial battery and related charging equipment, and energy storage
solutions, used predominantly for standby or back-up energy for facilities and buildings, to store energy generated by utility-scale energy
sources, or as a buffer or supplement to the electric energy grid (such equipment excludes batteries predominantly used for electronic
devices and consumer electronics, commercial, passenger, military, industrial or other service vehicles, and EV charging stations, subject
to the exceptions described in the Index methodology)&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-align: justify"&gt;4.
&#160;&#160;&#160;&#160;&#160;&#160;&#160;The heading of the fourth Sub-Theme is hereby revised to &#x201c;&lt;i&gt;4. Data Centers and AI
Infrastructure&lt;/i&gt;.&#x201d;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify"&gt;The first bullet under this Sub-Theme is
deleted and replaced with the following:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.75in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;ownership or operation of data centers, including those predominantly used for digital asset mining&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-align: justify; text-indent: 0.25in"&gt;The following bullets
are added under this Sub-Theme:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.75in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify; padding-right: 0.5in"&gt;operation as a neocloud provider, defined as a specialized cloud computing provider
focused on delivering scalable GPU-as-a-Service for artificial intelligence and high-performance computing workloads, that generates at
least 50% of its revenue from such activities&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.5in 0 1in; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.75in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify; padding-right: 0.5in"&gt;AI-as-a-Service, defined as companies with at least 50% of revenue from AI-based
search and Large Language Model products and services&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-align: justify"&gt;The bullet relating to AI Hardware is deleted
and replaced with the following:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.75in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify; padding-right: 0.5in"&gt;design and sale of AI hardware by companies that derive at least 50% of their revenue
from the semiconductor industry, operate as fabless semiconductor companies, and offer products or services used in AI processes, subject
to the additional exclusions described in the Index methodology&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;









&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following revisions are made under the heading
&#x201c;&lt;b&gt;Constituent Selection&lt;/b&gt;&#x201d;:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-align: justify"&gt;The sentence stating that all securities
meeting the size and liquidity criteria are included in the Index, and the sentence providing for the selection of additional securities
to achieve a portfolio size of 25 constituents, are deleted.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.25in"&gt;The following is added immediately
after the first sentence of the section:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.5in; text-align: justify"&gt;For securities that are not current Index components,
the Index generally requires a minimum free-float of 10% and a full market capitalization exceeding $300 million. For current Index components,
the Index generally requires a minimum free-float of 5% and a full market capitalization exceeding $150 million. Applicable trading-volume
requirements also apply.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.25in"&gt;The following subsection is added
immediately thereafter:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.5in; text-align: justify"&gt;Constituent selection is applied separately
to each Sub-Theme. All eligible securities are selected for the Power Generation and Electric Grid Equipment and Construction and Engineering
Sub-Themes. For Electric Utilities and Power Producers, eligible securities are ranked by free-float market capitalization; securities
ranked in the top 10 are selected, and the highest-ranking current Index components ranked 11 through 15 may also be selected. Within
Data Centers and AI Infrastructure, all eligible Data Center and Neocloud securities are selected. AI Hardware and AI-as-a-Service securities
are ranked separately by free-float market capitalization; securities ranked in the top 7 are selected, and the highest-ranking current
Index components ranked 8 through 10 may also be selected.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.25in"&gt;The following is added at the
end of the section:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.5in; text-align: justify"&gt;Recent initial public offerings (&#x201c;IPOs&#x201d;),
spin-offs and post-merger/acquisition special purpose acquisition companies may qualify for one-time fast-track addition under modified
investability requirements. Special fast-track rules also apply to certain IPOs and spin-offs with a full market capitalization exceeding
$5 billion that are associated with the AI-as-a-Service category. For these special cases, a minimum 5% free-float applies and no historical
liquidity requirement is imposed. Certain off-cycle additions are subject to a maximum 5% Index weight.&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following revisions are made under the heading
&#x201c;&lt;b&gt;Weighting&lt;/b&gt;&#x201d;:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-align: justify"&gt;The first paragraph is amended and restated
as follows:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.5in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;50% of its weight to Sub-Theme 1&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.5in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;12.5% of its weight to Sub-Theme 2&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.5in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;12.5% of its weight to Sub-Theme 3&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;table cellpadding="0" cellspacing="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; margin-top: 0; margin-bottom: 0"&gt;&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 0.5in"&gt;&lt;/td&gt;&lt;td style="width: 0.25in"&gt;&lt;span style="font-family: Symbol"&gt;&#xb7;&lt;/span&gt;&lt;/td&gt;&lt;td style="text-align: justify"&gt;25% of its weight to Sub-Theme 4&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.25in"&gt;The following is added immediately
after the second paragraph:&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 10pt Times New Roman, Times, Serif; margin: 0 0.5in; text-align: justify"&gt;The maximum individual security weight is generally
8%. A 4% maximum applies to Data Centers and AI Infrastructure companies and to Index components with less than 50% exposure to the qualifying
activities described above. If a security exceeds its applicable maximum weight, the excess weight is redistributed equally among uncapped
components within the same Sub-Theme. The aggregate weight of Index components with less than 50% exposure to the qualifying activities
may not exceed 20%. The individual security caps and the aggregate 20% limitation take precedence over the target Sub-Theme weights, which
may be adjusted proportionally as necessary to satisfy the Index&#x2019;s capping constraints.&lt;/p&gt;

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