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        <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link" >
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ArpsMember" xlink:to="lab_cik0001160990_ArpsMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CommonSharesMember" xlink:to="lab_cik0001160990_CommonSharesMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_InflationIndexedSecurityRiskMember" xml:lang="en-US">Inflation Indexed Security Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_InflationIndexedSecurityRiskMember" xlink:to="lab_cik0001160990_InflationIndexedSecurityRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_OtherInvestmentCompaniesRiskMember" xlink:to="lab_cik0001160990_OtherInvestmentCompaniesRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SeniorDebtRiskMember" xml:lang="en-US">Senior Debt Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SeniorDebtRiskMember" xlink:to="lab_cik0001160990_SeniorDebtRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_FocusedInvestmentRiskMember" xml:lang="en-US">Focused Investment Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_FocusedInvestmentRiskMember" xlink:to="lab_cik0001160990_FocusedInvestmentRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SmallerCompanyRiskMember" xml:lang="en-US">Smaller Company Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SmallerCompanyRiskMember" xlink:to="lab_cik0001160990_SmallerCompanyRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CyberSecurityRiskMember" xml:lang="en-US">Cyber Security Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CyberSecurityRiskMember" xlink:to="lab_cik0001160990_CyberSecurityRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CurrencyRiskMember" xml:lang="en-US">Currency Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CurrencyRiskMember" xlink:to="lab_cik0001160990_CurrencyRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_AssetAllocationRiskMember" xml:lang="en-US">Asset Allocation Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_AssetAllocationRiskMember" xlink:to="lab_cik0001160990_AssetAllocationRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PrivacyAndDataSecurityRiskMember" xlink:to="lab_cik0001160990_PrivacyAndDataSecurityRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_OperationalRiskMember" xlink:label="loc_cik0001160990_OperationalRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_OperationalRiskMember" xlink:to="lab_cik0001160990_OperationalRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RegulatoryChangesRiskMember" xml:lang="en-US">Regulatory Changes Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_RegulatoryChangesRiskMember" xlink:to="lab_cik0001160990_RegulatoryChangesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_ZeroCouponBondStepUpsAndPaymentInKindSecuritiesRiskMember" xlink:label="loc_cik0001160990_ZeroCouponBondStepUpsAndPaymentInKindSecuritiesRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ZeroCouponBondStepUpsAndPaymentInKindSecuritiesRiskMember" xlink:to="lab_cik0001160990_ZeroCouponBondStepUpsAndPaymentInKindSecuritiesRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_MarketRiskMember" xml:lang="en-US">Market Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_MarketRiskMember" xlink:to="lab_cik0001160990_MarketRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" xlink:label="loc_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" xml:lang="en-US">Insurance Linked and Other Instruments Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" xlink:to="lab_cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_StructuredInvestmentsRiskMember" xml:lang="en-US">Structured Investments Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_StructuredInvestmentsRiskMember" xlink:to="lab_cik0001160990_StructuredInvestmentsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_SovereignDebtRiskMember" xlink:label="loc_cik0001160990_SovereignDebtRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SovereignDebtRiskMember" xml:lang="en-US">Sovereign Debt Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SovereignDebtRiskMember" xlink:to="lab_cik0001160990_SovereignDebtRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_IssuerRiskMember" xml:lang="en-US">Issuer risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_IssuerRiskMember" xlink:to="lab_cik0001160990_IssuerRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_CreditDefaultSwapsRiskMember" xlink:label="loc_cik0001160990_CreditDefaultSwapsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CreditDefaultSwapsRiskMember" xml:lang="en-US">Credit Default Swaps Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CreditDefaultSwapsRiskMember" xlink:to="lab_cik0001160990_CreditDefaultSwapsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_CounterpartyRiskMember" xlink:label="loc_cik0001160990_CounterpartyRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CounterpartyRiskMember" xml:lang="en-US">Counterparty Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_CounterpartyRiskMember" xlink:to="lab_cik0001160990_CounterpartyRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_RegulationSSecuritiesRiskMember" xlink:label="loc_cik0001160990_RegulationSSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RegulationSSecuritiesRiskMember" xml:lang="en-US">Regulation S Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_RegulationSSecuritiesRiskMember" xlink:to="lab_cik0001160990_RegulationSSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_ValuationRiskMember" xlink:label="loc_cik0001160990_ValuationRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ValuationRiskMember" xml:lang="en-US">Valuation Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ValuationRiskMember" xlink:to="lab_cik0001160990_ValuationRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_HighYieldSecuritiesRiskMember" xlink:label="loc_cik0001160990_HighYieldSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_HighYieldSecuritiesRiskMember" xml:lang="en-US">High Yield Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_HighYieldSecuritiesRiskMember" xlink:to="lab_cik0001160990_HighYieldSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_ReinvestmentRiskMember" xlink:label="loc_cik0001160990_ReinvestmentRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ReinvestmentRiskMember" xml:lang="en-US">Reinvestment Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ReinvestmentRiskMember" xlink:to="lab_cik0001160990_ReinvestmentRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_TaxRiskMember" xlink:label="loc_cik0001160990_TaxRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_TaxRiskMember" xml:lang="en-US">Tax Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_TaxRiskMember" xlink:to="lab_cik0001160990_TaxRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_PreferredSecuritiesRiskMember" xlink:label="loc_cik0001160990_PreferredSecuritiesRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PreferredSecuritiesRiskMember" xml:lang="en-US">Preferred Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PreferredSecuritiesRiskMember" xlink:to="lab_cik0001160990_PreferredSecuritiesRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_DistributionRateRiskMember" xlink:label="loc_cik0001160990_DistributionRateRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_DistributionRateRiskMember" xml:lang="en-US">Distribution Rate Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_DistributionRateRiskMember" xlink:to="lab_cik0001160990_DistributionRateRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_ConfidentialInformationAccessRiskMember" xlink:label="loc_cik0001160990_ConfidentialInformationAccessRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ConfidentialInformationAccessRiskMember" xml:lang="en-US">Confidential Information Access Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ConfidentialInformationAccessRiskMember" xlink:to="lab_cik0001160990_ConfidentialInformationAccessRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_SubprimeRiskMember" xlink:label="loc_cik0001160990_SubprimeRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_SubprimeRiskMember" xml:lang="en-US">Subprime Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_SubprimeRiskMember" xlink:to="lab_cik0001160990_SubprimeRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_MarketDisruptionsRiskMember" xlink:label="loc_cik0001160990_MarketDisruptionsRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CsdrRelatedRiskMember" xml:lang="en-US">CSDR Related Risk [Member]</link:label>
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_CallRiskMember" xml:lang="en-US">Call Risk [Member]</link:label>
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_DistressedAndDefaultedSecuritiesRiskMember" xlink:to="lab_cik0001160990_DistressedAndDefaultedSecuritiesRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_MarketDiscountRiskMember" xml:lang="en-US">Market Discount Risk [Member]</link:label>
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ManagementRiskMember" xml:lang="en-US">Management Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ManagementRiskMember" xlink:to="lab_cik0001160990_ManagementRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RealEstateRiskMember" xml:lang="en-US">Real Estate Risk [Member]</link:label>
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ConvertibleSecuritiesRiskMember" xml:lang="en-US">Convertible Securities Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ConvertibleSecuritiesRiskMember" xlink:to="lab_cik0001160990_ConvertibleSecuritiesRiskMember" />
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          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_EmergingMarketsRiskMember" xml:lang="en-US">Emerging Markets Risk [Member]</link:label>
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          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_MortgageRelatedDerivativeInstrumentsRiskMember" xlink:label="loc_cik0001160990_MortgageRelatedDerivativeInstrumentsRiskMember" />
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          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_LeverageRiskMember" xlink:to="lab_cik0001160990_LeverageRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" xlink:label="loc_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" xml:lang="en-US">Equity Securities and Related Market Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" xlink:to="lab_cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_ForeignLoanOriginationsRiskMember" xlink:label="loc_cik0001160990_ForeignLoanOriginationsRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_ForeignLoanOriginationsRiskMember" xml:lang="en-US">Foreign Loan Originations Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_ForeignLoanOriginationsRiskMember" xlink:to="lab_cik0001160990_ForeignLoanOriginationsRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_LoanOriginationRiskMember" xlink:label="loc_cik0001160990_LoanOriginationRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_LoanOriginationRiskMember" xml:lang="en-US">Loan Origination Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_LoanOriginationRiskMember" xlink:to="lab_cik0001160990_LoanOriginationRiskMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" xlink:label="loc_cik0001160990_PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" xml:lang="en-US">Potential Conflicts of Interest Risk Allocation of Investment Opportunities [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_cik0001160990_PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" xml:lang="en-US">Potential Conflicts of Interest Risk &#8212; Allocation of Investment Opportunities [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" xlink:to="lab_cik0001160990_PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" xlink:label="loc_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" xml:lang="en-US">Regulatory Risk Commodity Pool Operator [Member]</link:label>
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" xml:lang="en-US">Regulatory Risk &#8212; Commodity Pool Operator [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" xlink:to="lab_cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" />
          <link:loc xlink:type="locator" xlink:href="cik0001160990-20260630.xsd#cik0001160990_PortfolioTurnoverRiskMember" xlink:label="loc_cik0001160990_PortfolioTurnoverRiskMember" />
          <link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_cik0001160990_PortfolioTurnoverRiskMember" xml:lang="en-US">Portfolio Turnover Risk [Member]</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_cik0001160990_PortfolioTurnoverRiskMember" xlink:to="lab_cik0001160990_PortfolioTurnoverRiskMember" />
        </link:labelLink>
      </link:linkbase>
    </appinfo>
  </annotation>
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  <import namespace="http://xbrl.sec.gov/cef-pre/2026" schemaLocation="https://xbrl.sec.gov/cef/2026/cef-2026_pre.xsd" />
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd" />
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" />
  <element name="ArpsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ArpsMember" substitutionGroup="xbrli:item" />
  <element name="AssetAllocationRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_AssetAllocationRiskMember" substitutionGroup="xbrli:item" />
  <element name="CallRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CallRiskMember" substitutionGroup="xbrli:item" />
  <element name="CertainAffiliationsMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CertainAffiliationsMember" substitutionGroup="xbrli:item" />
  <element name="CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CollateralizedBondObligationsCollateralizedLoanObligationsAndCollateralizedDebtObligationsRiskMember" substitutionGroup="xbrli:item" />
  <element name="ConfidentialInformationAccessRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ConfidentialInformationAccessRiskMember" substitutionGroup="xbrli:item" />
  <element name="ContingentConvertibleSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ContingentConvertibleSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="ConvertibleSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ConvertibleSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="CounterpartyRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CounterpartyRiskMember" substitutionGroup="xbrli:item" />
  <element name="CovenantLiteObligationsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CovenantLiteObligationsRiskMember" substitutionGroup="xbrli:item" />
  <element name="CreditDefaultSwapsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CreditDefaultSwapsRiskMember" substitutionGroup="xbrli:item" />
  <element name="CreditRisksMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CreditRisksMember" substitutionGroup="xbrli:item" />
  <element name="CsdrRelatedRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CsdrRelatedRiskMember" substitutionGroup="xbrli:item" />
  <element name="CurrencyRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CurrencyRiskMember" substitutionGroup="xbrli:item" />
  <element name="CyberSecurityRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CyberSecurityRiskMember" substitutionGroup="xbrli:item" />
  <element name="DebtSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_DebtSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="IssuerRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_IssuerRiskMember" substitutionGroup="xbrli:item" />
  <element name="ReinvestmentRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ReinvestmentRiskMember" substitutionGroup="xbrli:item" />
  <element name="DerivativesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_DerivativesRiskMember" substitutionGroup="xbrli:item" />
  <element name="DistressedAndDefaultedSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_DistressedAndDefaultedSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="DistributionRateRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_DistributionRateRiskMember" substitutionGroup="xbrli:item" />
  <element name="EmergingMarketsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_EmergingMarketsRiskMember" substitutionGroup="xbrli:item" />
  <element name="EquitySecuritiesAndRelatedMarketRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_EquitySecuritiesAndRelatedMarketRiskMember" substitutionGroup="xbrli:item" />
  <element name="FocusedInvestmentRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_FocusedInvestmentRiskMember" substitutionGroup="xbrli:item" />
  <element name="ForeignNonusInvestmentRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ForeignNonusInvestmentRiskMember" substitutionGroup="xbrli:item" />
  <element name="HighYieldSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_HighYieldSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="InflationDeflationRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_InflationDeflationRiskMember" substitutionGroup="xbrli:item" />
  <element name="InflationIndexedSecurityRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_InflationIndexedSecurityRiskMember" substitutionGroup="xbrli:item" />
  <element name="InsuranceLinkedAndOtherInstrumentsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_InsuranceLinkedAndOtherInstrumentsRiskMember" substitutionGroup="xbrli:item" />
  <element name="LeverageRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_LeverageRiskMember" substitutionGroup="xbrli:item" />
  <element name="LiquidityRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_LiquidityRiskMember" substitutionGroup="xbrli:item" />
  <element name="LoansAndOtherIndebtednessLoanAcquisitionsParticipationsAndAssignmentsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_LoansAndOtherIndebtednessLoanAcquisitionsParticipationsAndAssignmentsRiskMember" substitutionGroup="xbrli:item" />
  <element name="ManagementRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ManagementRiskMember" substitutionGroup="xbrli:item" />
  <element name="MarketDiscountRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_MarketDiscountRiskMember" substitutionGroup="xbrli:item" />
  <element name="MarketDisruptionsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_MarketDisruptionsRiskMember" substitutionGroup="xbrli:item" />
  <element name="MarketRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_MarketRiskMember" substitutionGroup="xbrli:item" />
  <element name="MortgageRelatedAndOtherAssetBackedInstrumentsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_MortgageRelatedAndOtherAssetBackedInstrumentsRiskMember" substitutionGroup="xbrli:item" />
  <element name="MortgageRelatedDerivativeInstrumentsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_MortgageRelatedDerivativeInstrumentsRiskMember" substitutionGroup="xbrli:item" />
  <element name="OperationalRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_OperationalRiskMember" substitutionGroup="xbrli:item" />
  <element name="OtherInvestmentCompaniesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_OtherInvestmentCompaniesRiskMember" substitutionGroup="xbrli:item" />
  <element name="PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_PotentialConflictsOfInterestRiskAllocationOfInvestmentOpportunitiesMember" substitutionGroup="xbrli:item" />
  <element name="PreferredSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_PreferredSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="PrivacyAndDataSecurityRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_PrivacyAndDataSecurityRiskMember" substitutionGroup="xbrli:item" />
  <element name="PrivatePlacementsAndRestrictedSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_PrivatePlacementsAndRestrictedSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="RealEstateRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_RealEstateRiskMember" substitutionGroup="xbrli:item" />
  <element name="RegulationSSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_RegulationSSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="RegulatoryChangesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_RegulatoryChangesRiskMember" substitutionGroup="xbrli:item" />
  <element name="RegulatoryRiskCommodityPoolOperatorMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_RegulatoryRiskCommodityPoolOperatorMember" substitutionGroup="xbrli:item" />
  <element name="RepurchaseAgreementsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_RepurchaseAgreementsRiskMember" substitutionGroup="xbrli:item" />
  <element name="SecuritiesLendingRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SecuritiesLendingRiskMember" substitutionGroup="xbrli:item" />
  <element name="SeniorDebtRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SeniorDebtRiskMember" substitutionGroup="xbrli:item" />
  <element name="SmallerCompanyRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SmallerCompanyRiskMember" substitutionGroup="xbrli:item" />
  <element name="SovereignDebtRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SovereignDebtRiskMember" substitutionGroup="xbrli:item" />
  <element name="StructuredInvestmentsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_StructuredInvestmentsRiskMember" substitutionGroup="xbrli:item" />
  <element name="SubprimeRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SubprimeRiskMember" substitutionGroup="xbrli:item" />
  <element name="SubsidiaryRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SubsidiaryRiskMember" substitutionGroup="xbrli:item" />
  <element name="SyntheticConvertibleSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_SyntheticConvertibleSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="TaxRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_TaxRiskMember" substitutionGroup="xbrli:item" />
  <element name="UsGovernmentSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_UsGovernmentSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="ValuationRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ValuationRiskMember" substitutionGroup="xbrli:item" />
  <element name="ZeroCouponBondStepUpsAndPaymentInKindSecuritiesRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ZeroCouponBondStepUpsAndPaymentInKindSecuritiesRiskMember" substitutionGroup="xbrli:item" />
  <element name="ForeignLoanOriginationsRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_ForeignLoanOriginationsRiskMember" substitutionGroup="xbrli:item" />
  <element name="LoanOriginationRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_LoanOriginationRiskMember" substitutionGroup="xbrli:item" />
  <element name="PortfolioTurnoverRiskMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_PortfolioTurnoverRiskMember" substitutionGroup="xbrli:item" />
  <element name="CommonSharesMember" type="dtr-types:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" id="cik0001160990_CommonSharesMember" substitutionGroup="xbrli:item" />
</schema>
