<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Fri Oct 16 11:15:28 UTC 2026 -->
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_ClosedEndFundStructureLimitedLiquidityMember_lbl" xml:lang="en-US">Closed-End Fund Structure; Limited Liquidity [Member]</label>
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    <loc xlink:type="locator" xlink:label="nb_SuitabilityMember" xlink:href="nb-20261019.xsd#nb_SuitabilityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_SuitabilityMember_lbl" xml:lang="en-US">Suitability [Member]</label>
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    <loc xlink:type="locator" xlink:label="nb_ValuationRiskMember" xlink:href="nb-20261019.xsd#nb_ValuationRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_ValuationRiskMember_lbl" xml:lang="en-US">Valuation Risk [Member]</label>
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    <loc xlink:type="locator" xlink:label="nb_LeverageRiskMember" xlink:href="nb-20261019.xsd#nb_LeverageRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_LeverageRiskMember_lbl" xml:lang="en-US">Leverage Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_LeverageRiskMember" xlink:to="nb_LeverageRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_RepurchaseOffersRiskMember" xlink:href="nb-20261019.xsd#nb_RepurchaseOffersRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_RepurchaseOffersRiskMember_lbl" xml:lang="en-US">Repurchase Offers Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_RepurchaseOffersRiskMember" xlink:to="nb_RepurchaseOffersRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_DependenceOnTheAdviserAndKeyPersonnelMember" xlink:href="nb-20261019.xsd#nb_DependenceOnTheAdviserAndKeyPersonnelMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_DependenceOnTheAdviserAndKeyPersonnelMember_lbl" xml:lang="en-US">Dependence on the Adviser and Key Personnel [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_DependenceOnTheAdviserAndKeyPersonnelMember" xlink:to="nb_DependenceOnTheAdviserAndKeyPersonnelMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_IndemnificationObligationsAndLimitedLiabilityOfManagersAndAdviserMember" xlink:href="nb-20261019.xsd#nb_IndemnificationObligationsAndLimitedLiabilityOfManagersAndAdviserMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_IndemnificationObligationsAndLimitedLiabilityOfManagersAndAdviserMember_lbl" xml:lang="en-US">Indemnification Obligations and Limited Liability of Managers and Adviser [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_IndemnificationObligationsAndLimitedLiabilityOfManagersAndAdviserMember" xlink:to="nb_IndemnificationObligationsAndLimitedLiabilityOfManagersAndAdviserMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_PortfolioConstructionMayVaryMember" xlink:href="nb-20261019.xsd#nb_PortfolioConstructionMayVaryMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_PortfolioConstructionMayVaryMember_lbl" xml:lang="en-US">Portfolio Construction May Vary [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_PortfolioConstructionMayVaryMember" xlink:to="nb_PortfolioConstructionMayVaryMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_ProjectionsMember" xlink:href="nb-20261019.xsd#nb_ProjectionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_ProjectionsMember_lbl" xml:lang="en-US">Projections [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_ProjectionsMember" xlink:to="nb_ProjectionsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_DecisionMakingAuthorityRiskMember" xlink:href="nb-20261019.xsd#nb_DecisionMakingAuthorityRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_DecisionMakingAuthorityRiskMember_lbl" xml:lang="en-US">Decision-Making Authority Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_DecisionMakingAuthorityRiskMember" xlink:to="nb_DecisionMakingAuthorityRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_ManagementRiskMember" xlink:href="nb-20261019.xsd#nb_ManagementRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_ManagementRiskMember_lbl" xml:lang="en-US">Management Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_ManagementRiskMember" xlink:to="nb_ManagementRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_RelianceOnServiceProvidersMember" xlink:href="nb-20261019.xsd#nb_RelianceOnServiceProvidersMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_RelianceOnServiceProvidersMember_lbl" xml:lang="en-US">Reliance on Service Providers [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_RelianceOnServiceProvidersMember" xlink:to="nb_RelianceOnServiceProvidersMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_EffectOfFeesAndExpensesOnReturnsMultipleLevelsOfFeesAndExpensesMember" xlink:href="nb-20261019.xsd#nb_EffectOfFeesAndExpensesOnReturnsMultipleLevelsOfFeesAndExpensesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_EffectOfFeesAndExpensesOnReturnsMultipleLevelsOfFeesAndExpensesMember_lbl" xml:lang="en-US">Effect of Fees and Expenses on Returns (Multiple Levels of Fees and Expenses) [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_EffectOfFeesAndExpensesOnReturnsMultipleLevelsOfFeesAndExpensesMember" xlink:to="nb_EffectOfFeesAndExpensesOnReturnsMultipleLevelsOfFeesAndExpensesMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_AffiliatedSeedInvestmentMember" xlink:href="nb-20261019.xsd#nb_AffiliatedSeedInvestmentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_AffiliatedSeedInvestmentMember_lbl" xml:lang="en-US">Affiliated Seed Investment [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_AffiliatedSeedInvestmentMember" xlink:to="nb_AffiliatedSeedInvestmentMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_InvestmentInReceivablesRiskMember" xlink:href="nb-20261019.xsd#nb_InvestmentInReceivablesRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_InvestmentInReceivablesRiskMember_lbl" xml:lang="en-US">Investment in Receivables Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_InvestmentInReceivablesRiskMember" xlink:to="nb_InvestmentInReceivablesRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_RisksRelatedToSpecialtyFinanceIndustryMember" xlink:href="nb-20261019.xsd#nb_RisksRelatedToSpecialtyFinanceIndustryMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_RisksRelatedToSpecialtyFinanceIndustryMember_lbl" xml:lang="en-US">Risks Related to Specialty Finance Industry [Member]</label>
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    <loc xlink:type="locator" xlink:label="nb_FixedIncomeSecuritiesRisksMember" xlink:href="nb-20261019.xsd#nb_FixedIncomeSecuritiesRisksMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_FixedIncomeSecuritiesRisksMember_lbl" xml:lang="en-US">Fixed-Income Securities Risks [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_FixedIncomeSecuritiesRisksMember" xlink:to="nb_FixedIncomeSecuritiesRisksMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_YieldAndRatingsRiskMember" xlink:href="nb-20261019.xsd#nb_YieldAndRatingsRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_YieldAndRatingsRiskMember_lbl" xml:lang="en-US">Yield and Ratings Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_YieldAndRatingsRiskMember" xlink:to="nb_YieldAndRatingsRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_CorporateBondsRiskMember" xlink:href="nb-20261019.xsd#nb_CorporateBondsRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_CorporateBondsRiskMember_lbl" xml:lang="en-US">Corporate Bonds Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_CorporateBondsRiskMember" xlink:to="nb_CorporateBondsRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_BelowInvestmentGradeSecuritiesRiskMember" xlink:href="nb-20261019.xsd#nb_BelowInvestmentGradeSecuritiesRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_BelowInvestmentGradeSecuritiesRiskMember_lbl" xml:lang="en-US">Below Investment Grade Securities Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_BelowInvestmentGradeSecuritiesRiskMember" xlink:to="nb_BelowInvestmentGradeSecuritiesRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_AssetBackedSecuritiesRiskMember" xlink:href="nb-20261019.xsd#nb_AssetBackedSecuritiesRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_AssetBackedSecuritiesRiskMember_lbl" xml:lang="en-US">Asset-Backed Securities Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_AssetBackedSecuritiesRiskMember" xlink:to="nb_AssetBackedSecuritiesRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_MortgageBackedSecuritiesRiskMember" xlink:href="nb-20261019.xsd#nb_MortgageBackedSecuritiesRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_MortgageBackedSecuritiesRiskMember_lbl" xml:lang="en-US">Mortgage-Backed Securities Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_MortgageBackedSecuritiesRiskMember" xlink:to="nb_MortgageBackedSecuritiesRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_ConsumerLoansRiskMember" xlink:href="nb-20261019.xsd#nb_ConsumerLoansRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_ConsumerLoansRiskMember_lbl" xml:lang="en-US">Consumer Loans Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_ConsumerLoansRiskMember" xlink:to="nb_ConsumerLoansRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_CorporateAssetBasedCreditRiskMember" xlink:href="nb-20261019.xsd#nb_CorporateAssetBasedCreditRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_CorporateAssetBasedCreditRiskMember_lbl" xml:lang="en-US">Corporate Asset-Based Credit Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_CorporateAssetBasedCreditRiskMember" xlink:to="nb_CorporateAssetBasedCreditRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_RoyaltiesRiskMember" xlink:href="nb-20261019.xsd#nb_RoyaltiesRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_RoyaltiesRiskMember_lbl" xml:lang="en-US">Royalties Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_RoyaltiesRiskMember" xlink:to="nb_RoyaltiesRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_TransportationFinanceRiskMember" xlink:href="nb-20261019.xsd#nb_TransportationFinanceRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_TransportationFinanceRiskMember_lbl" xml:lang="en-US">Transportation Finance Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_TransportationFinanceRiskMember" xlink:to="nb_TransportationFinanceRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_AircraftAndAviationIndustryRiskMember" xlink:href="nb-20261019.xsd#nb_AircraftAndAviationIndustryRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_AircraftAndAviationIndustryRiskMember_lbl" xml:lang="en-US">Aircraft and Aviation Industry Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_AircraftAndAviationIndustryRiskMember" xlink:to="nb_AircraftAndAviationIndustryRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_LitigationFinanceRiskMember" xlink:href="nb-20261019.xsd#nb_LitigationFinanceRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_LitigationFinanceRiskMember_lbl" xml:lang="en-US">Litigation Finance Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_LitigationFinanceRiskMember" xlink:to="nb_LitigationFinanceRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_RealAssetsInvestmentsRiskMember" xlink:href="nb-20261019.xsd#nb_RealAssetsInvestmentsRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_RealAssetsInvestmentsRiskMember_lbl" xml:lang="en-US">Real Assets Investments Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_RealAssetsInvestmentsRiskMember" xlink:to="nb_RealAssetsInvestmentsRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_CollateralizedLoanObligationsRiskMember" xlink:href="nb-20261019.xsd#nb_CollateralizedLoanObligationsRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_CollateralizedLoanObligationsRiskMember_lbl" xml:lang="en-US">Collateralized Loan Obligations Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_CollateralizedLoanObligationsRiskMember" xlink:to="nb_CollateralizedLoanObligationsRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_StructuredInvestmentRiskMember" xlink:href="nb-20261019.xsd#nb_StructuredInvestmentRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_StructuredInvestmentRiskMember_lbl" xml:lang="en-US">Structured Investment Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_StructuredInvestmentRiskMember" xlink:to="nb_StructuredInvestmentRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_VolatilityOfCollateralValueRiskMember" xlink:href="nb-20261019.xsd#nb_VolatilityOfCollateralValueRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_VolatilityOfCollateralValueRiskMember_lbl" xml:lang="en-US">Volatility of Collateral Value Risk [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nb_VolatilityOfCollateralValueRiskMember" xlink:to="nb_VolatilityOfCollateralValueRiskMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nb_SeniorSecuredCreditRiskMember" xlink:href="nb-20261019.xsd#nb_SeniorSecuredCreditRiskMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nb_SeniorSecuredCreditRiskMember_lbl" xml:lang="en-US">Senior Secured Credit Risk [Member]</label>
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