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            <counterparties>
              <counterpartyName>Chicago Board of Trade</counterpartyName>
              <counterpartyLei>549300EX04Q2QBFQTQ27</counterpartyLei>
            </counterparties>
            <payOffProf>Long</payOffProf>
            <descRefInstrmnt>
              <indexBasketInfo>
                <indexName>CME Ultra Long Term U.S. Treasury Bond Futures</indexName>
                <indexIdentifier>WNZ3 Comdty</indexIdentifier>
              </indexBasketInfo>
            </descRefInstrmnt>
            <expDate>2023-12-19</expDate>
            <notionalAmt>127687.18000000</notionalAmt>
            <curCd>USD</curCd>
            <unrealizedAppr>-16093.43000000</unrealizedAppr>
          </futrDeriv>
        </derivativeInfo>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States Treasury</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>United States Treasury Note/Bond</title>
        <cusip>912810QY7</cusip>
        <identifiers>
          <isin value="US912810QY73"/>
        </identifiers>
        <balance>47833000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>33333621.88000000</valUSD>
        <pctVal>1.559318950735</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2042-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>2.75000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States Treasury</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>United States Treasury Note/Bond</title>
        <cusip>912810RG5</cusip>
        <identifiers>
          <isin value="US912810RG58"/>
        </identifiers>
        <balance>11308000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>8605122.94000000</valUSD>
        <pctVal>0.402540453661</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2044-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>3.38000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="8605122.94048000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>United States Treasury</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>United States Treasury Note/Bond</title>
        <cusip>912810SS8</cusip>
        <identifiers>
          <isin value="US912810SS87"/>
        </identifiers>
        <balance>254369000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>124591129.19000000</valUSD>
        <pctVal>5.828268813357</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2050-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>1.63000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="105194863.46661000"/>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>



      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>


    </explntrNotes>
    <signature>
      <ncom:dateSigned>2023-11-30</ncom:dateSigned>
      <ncom:nameOfApplicant>BlackRock Funds</ncom:nameOfApplicant>
      <ncom:signature>Chuck Pulsfort</ncom:signature>
      <ncom:signerName>Chuck Pulsfort</ncom:signerName>
      <ncom:title>Assistant Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
