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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2051-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.01875000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 3.875% 8/15/40</title>
        <cusip>912810QK7</cusip>
        <identifiers>
          <isin value="US912810QK79"/>
        </identifiers>
        <balance>46505000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>49224452.42000000</valUSD>
        <pctVal>0.298451719248</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2040-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03875000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.625% 2/15/40</title>
        <cusip>912810QE1</cusip>
        <identifiers>
          <isin value="US912810QE10"/>
        </identifiers>
        <balance>35743000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>41868177.47000000</valUSD>
        <pctVal>0.253850046742</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2040-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04625000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.25% 02/15/2052</title>
        <cusip>912810TD0</cusip>
        <identifiers>
          <isin value="US912810TD00"/>
        </identifiers>
        <balance>1323220000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>1056921975.00000000</valUSD>
        <pctVal>6.408200905083</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2052-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02250000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.375% 11/15/2049</title>
        <cusip>912810SK5</cusip>
        <identifiers>
          <isin value="US912810SK51"/>
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        <balance>502572000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>414170369.21000000</valUSD>
        <pctVal>2.511147461788</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2049-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02375000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.625% 11/15/2050</title>
        <cusip>912810SS8</cusip>
        <identifiers>
          <isin value="US912810SS87"/>
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        <balance>193973000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>132712387.01000000</valUSD>
        <pctVal>0.804645620650</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>0.01625000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.25% 08/15/2049</title>
        <cusip>912810SJ8</cusip>
        <identifiers>
          <isin value="US912810SJ88"/>
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        <balance>429147000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>343686400.35000000</valUSD>
        <pctVal>2.083797625446</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2049-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02250000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.75% 2/15/37</title>
        <cusip>912810PT9</cusip>
        <identifiers>
          <isin value="US912810PT97"/>
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        <balance>35563000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>42099090.34000000</valUSD>
        <pctVal>0.255250089600</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2037-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04750000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 2.75% 8/15/42</title>
        <cusip>912810QX9</cusip>
        <identifiers>
          <isin value="US912810QX90"/>
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        <balance>230060000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>202111303.54000000</valUSD>
        <pctVal>1.225416699536</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2042-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02750000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.50% 02/15/2045</title>
        <cusip>912810RK6</cusip>
        <identifiers>
          <isin value="US912810RK60"/>
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        <balance>390549000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>322843667.50000000</valUSD>
        <pctVal>1.957426499977</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2045-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 2.750% 11/15/42</title>
        <cusip>912810QY7</cusip>
        <identifiers>
          <isin value="US912810QY73"/>
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        <balance>113934000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>99883623.80000000</valUSD>
        <pctVal>0.605602252179</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>0.02750000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.875% 11/15/2051</title>
        <cusip>912810TB4</cusip>
        <identifiers>
          <isin value="US912810TB44"/>
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        <balance>610140000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>444305851.64000000</valUSD>
        <pctVal>2.693861257462</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2051-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.01875000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2% 02/15/2050</title>
        <cusip>912810SL3</cusip>
        <identifiers>
          <isin value="US912810SL35"/>
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        <balance>404349000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>305852110.78000000</valUSD>
        <pctVal>1.854405357710</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2050-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02000000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UST NOTES</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UST NOTES 2.75% 08/15/2032</title>
        <cusip>91282CFF3</cusip>
        <identifiers>
          <isin value="US91282CFF32"/>
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        <balance>19400000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>18714937.50000000</valUSD>
        <pctVal>0.113470135225</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2032-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02750000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <loanByFundCondition isLoanByFund="Y" loanVal="14970985.31000000"/>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3% 02/15/2048</title>
        <cusip>912810SA7</cusip>
        <identifiers>
          <isin value="US912810SA79"/>
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        <balance>676869000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>619943261.18000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2048-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</annualizedRt>
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          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 3.125% 2/15/42</title>
        <cusip>912810QU5</cusip>
        <identifiers>
          <isin value="US912810QU51"/>
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        <balance>14640000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>13763887.50000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2042-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03125000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3.125% 02/15/2043</title>
        <cusip>912810QZ4</cusip>
        <identifiers>
          <isin value="US912810QZ49"/>
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        <balance>114181000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>106125886.69000000</valUSD>
        <pctVal>0.643449582112</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2043-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03125000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.25% 05/15/2041</title>
        <cusip>912810SY5</cusip>
        <identifiers>
          <isin value="US912810SY55"/>
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        <balance>404582000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>329923977.81000000</valUSD>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
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          <couponKind>Fixed</couponKind>
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          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
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        <cusip>912810SH2</cusip>
        <identifiers>
          <isin value="US912810SH23"/>
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        <curCd>USD</curCd>
        <valUSD>580775852.98000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
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          <couponKind>Fixed</couponKind>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3.75% 11/15/2043</title>
        <cusip>912810RD2</cusip>
        <identifiers>
          <isin value="US912810RD28"/>
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        <curCd>USD</curCd>
        <valUSD>87307462.03000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
        <debtSec>
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          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03750000</annualizedRt>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.875% 02/15/2041</title>
        <cusip>912810SW9</cusip>
        <identifiers>
          <isin value="US912810SW99"/>
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        <balance>632606000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>484660212.40000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2041-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.01875000</annualizedRt>
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        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 5% 5/15/37</title>
        <cusip>912810PU6</cusip>
        <identifiers>
          <isin value="US912810PU60"/>
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        <balance>145827000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>176855112.43000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2037-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.05000000</annualizedRt>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 3.5% 2/15/39</title>
        <cusip>912810QA9</cusip>
        <identifiers>
          <isin value="US912810QA97"/>
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        <balance>106134000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>108762474.31000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2039-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
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          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.75% 08/15/2047</title>
        <cusip>912810RY6</cusip>
        <identifiers>
          <isin value="US912810RY64"/>
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        <balance>745784000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>648045509.07000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2047-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02750000</annualizedRt>
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          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.5% 05/15/2046</title>
        <cusip>912810RS9</cusip>
        <identifiers>
          <isin value="US912810RS96"/>
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        <balance>136970000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>112866490.58000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2046-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02500000</annualizedRt>
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          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2% 08/15/2051</title>
        <cusip>912810SZ2</cusip>
        <identifiers>
          <isin value="US912810SZ21"/>
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        <balance>856520000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>643460650.00000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2051-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02000000</annualizedRt>
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          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3% 08/15/2048</title>
        <cusip>912810SD1</cusip>
        <identifiers>
          <isin value="US912810SD19"/>
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        <balance>100182000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>92280927.17000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2048-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</annualizedRt>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.5% 2/15/36</title>
        <cusip>912810FT0</cusip>
        <identifiers>
          <isin value="US912810FT08"/>
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        <balance>133278000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>153665369.06000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2036-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04500000</annualizedRt>
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        <securityLending>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.875% 11/15/2046</title>
        <cusip>912810RU4</cusip>
        <identifiers>
          <isin value="US912810RU43"/>
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        <balance>25000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>22158.20000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2046-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02875000</annualizedRt>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.25% 11/15/40</title>
        <cusip>912810QL5</cusip>
        <identifiers>
          <isin value="US912810QL52"/>
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        <balance>61567000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>68399493.87000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2040-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04250000</annualizedRt>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3.375% 11/15/2048</title>
        <cusip>912810SE9</cusip>
        <identifiers>
          <isin value="US912810SE91"/>
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        <balance>13091000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>12965715.07000000</valUSD>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2048-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03375000</annualizedRt>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3% 02/15/2049</title>
        <cusip>912810SF6</cusip>
        <identifiers>
          <isin value="US912810SF66"/>
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        <curCd>USD</curCd>
        <valUSD>592942601.56000000</valUSD>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
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          <maturityDt>2049-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</annualizedRt>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.75% 2/15/41</title>
        <cusip>912810QN1</cusip>
        <identifiers>
          <isin value="US912810QN19"/>
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        <balance>19013000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>22501439.84000000</valUSD>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2041-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04750000</annualizedRt>
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          <isCashCollateral>N</isCashCollateral>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.375% 05/15/2051</title>
        <cusip>912810SX7</cusip>
        <identifiers>
          <isin value="US912810SX72"/>
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        <balance>635074000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>522844516.56000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2051-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02375000</annualizedRt>
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          <isCashCollateral>N</isCashCollateral>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.125% 05/15/2040</title>
        <cusip>912810SR0</cusip>
        <identifiers>
          <isin value="US912810SR05"/>
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        <balance>398337000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>271118120.63000000</valUSD>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.375% 11/15/2040</title>
        <cusip>912810ST6</cusip>
        <identifiers>
          <isin value="US912810ST60"/>
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        <curCd>USD</curCd>
        <valUSD>727409121.00000000</valUSD>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
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        <cusip>912810QW1</cusip>
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        <curCd>USD</curCd>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
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          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</annualizedRt>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.75% 11/15/2047</title>
        <cusip>912810RZ3</cusip>
        <identifiers>
          <isin value="US912810RZ30"/>
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        <curCd>USD</curCd>
        <valUSD>285406682.34000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2047-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02750000</annualizedRt>
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        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.875% 05/15/2052</title>
        <cusip>912810TG3</cusip>
        <identifiers>
          <isin value="US912810TG31"/>
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        <balance>117480000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>108265162.50000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
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          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02875000</annualizedRt>
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        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.5% 5/15/38</title>
        <cusip>912810PX0</cusip>
        <identifiers>
          <isin value="US912810PX00"/>
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        <balance>34092000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>39401562.74000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2038-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04500000</annualizedRt>
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          <isPaidKind>N</isPaidKind>
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        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.375% 11/15/39</title>
        <cusip>912810QD3</cusip>
        <identifiers>
          <isin value="US912810QD37"/>
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        <balance>17280000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>19645200.00000000</valUSD>
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        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2039-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04375000</annualizedRt>
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          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.375% 2/15/38</title>
        <cusip>912810PW2</cusip>
        <identifiers>
          <isin value="US912810PW27"/>
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        <balance>138304000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>157850244.31000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2038-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04375000</annualizedRt>
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        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.125% 08/15/2040</title>
        <cusip>912810SQ2</cusip>
        <identifiers>
          <isin value="US912810SQ22"/>
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        <balance>198730000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>134034068.54000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2040-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.01125000</annualizedRt>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
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          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3.375% 05/15/2044</title>
        <cusip>912810RG5</cusip>
        <identifiers>
          <isin value="US912810RG58"/>
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        <balance>122930000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>118593836.02000000</valUSD>
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        <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>0.03375000</annualizedRt>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3% 08/15/2052</title>
        <cusip>912810TJ7</cusip>
        <identifiers>
          <isin value="US912810TJ79"/>
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        <balance>1000000.00000000</balance>
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        <curCd>USD</curCd>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
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          <couponKind>Fixed</couponKind>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.25% 5/15/39</title>
        <cusip>912810QB7</cusip>
        <identifiers>
          <isin value="US912810QB70"/>
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        <curCd>USD</curCd>
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        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2039-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
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      <invstOrSec>
        <name>Fidelity Revere Street Trust</name>
        <lei>549300BDV45LJNXBZC55</lei>
        <title>Fidelity Cash Central Fund</title>
        <cusip>31635A105</cusip>
        <identifiers>
          <isin value="US31635A1051"/>
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        <balance>189682574.45100000</balance>
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        <curCd>USD</curCd>
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        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 3.75% 8/15/41</title>
        <cusip>912810QS0</cusip>
        <identifiers>
          <isin value="US912810QS06"/>
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        <balance>90738000.00000000</balance>
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        <curCd>USD</curCd>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3.625% 02/15/2044</title>
        <cusip>912810RE0</cusip>
        <identifiers>
          <isin value="US912810RE01"/>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2% 11/15/2041</title>
        <cusip>912810TC2</cusip>
        <identifiers>
          <isin value="US912810TC27"/>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3% 11/15/2045</title>
        <cusip>912810RP5</cusip>
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          <isin value="US912810RP57"/>
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        <curCd>USD</curCd>
        <valUSD>59031267.58000000</valUSD>
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        <issuerCat>UST</issuerCat>
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        <fairValLevel>2</fairValLevel>
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          <maturityDt>2045-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</annualizedRt>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.75% 08/15/2041</title>
        <cusip>912810TA6</cusip>
        <identifiers>
          <isin value="US912810TA60"/>
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        <balance>476080000.00000000</balance>
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        <curCd>USD</curCd>
        <valUSD>353712562.50000000</valUSD>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2041-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.01750000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.875% 08/15/2045</title>
        <cusip>912810RN0</cusip>
        <identifiers>
          <isin value="US912810RN00"/>
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        <balance>36332000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>32124016.50000000</valUSD>
        <pctVal>0.194770433844</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2045-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02875000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3% 02/15/2047</title>
        <cusip>912810RV2</cusip>
        <identifiers>
          <isin value="US912810RV26"/>
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        <balance>512294000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>464666667.19000000</valUSD>
        <pctVal>2.817310480510</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2047-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</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>Fidelity Revere Street Trust</name>
        <lei>549300BDV45LJNXBZC55</lei>
        <title>Fidelity Securities Lending Cash Central Fund</title>
        <cusip>31635A303</cusip>
        <identifiers>
          <isin value="US31635A3032"/>
        </identifiers>
        <balance>15362273.77200000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>15363810.00000000</valUSD>
        <pctVal>0.093151986122</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>STIV</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <cashCollateralCondition cashCollateralVal="15363810.00000000" isCashCollateral="Y"/>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3.0% 05/15/2045</title>
        <cusip>912810RM2</cusip>
        <identifiers>
          <isin value="US912810RM27"/>
        </identifiers>
        <balance>135524000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>122448050.88000000</valUSD>
        <pctVal>0.742412144921</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2045-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.375% 5/15/41</title>
        <cusip>912810QQ4</cusip>
        <identifiers>
          <isin value="US912810QQ40"/>
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        <balance>80788000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>91019042.41000000</valUSD>
        <pctVal>0.551855599323</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2041-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04375000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 3% 11/15/2044</title>
        <cusip>912810RJ9</cusip>
        <identifiers>
          <isin value="US912810RJ97"/>
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        <balance>109417000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>98945451.72000000</valUSD>
        <pctVal>0.599914041210</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2044-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3% 05/15/2047</title>
        <cusip>912810RX8</cusip>
        <identifiers>
          <isin value="US912810RX81"/>
        </identifiers>
        <balance>219562000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>199492660.94000000</valUSD>
        <pctVal>1.209539663884</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2047-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03000000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 1.25% 05/15/2050</title>
        <cusip>912810SN9</cusip>
        <identifiers>
          <isin value="US912810SN90"/>
        </identifiers>
        <balance>125768000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>77764908.75000000</valUSD>
        <pctVal>0.471494746464</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2050-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.01250000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.875% 05/15/2043</title>
        <cusip>912810RB6</cusip>
        <identifiers>
          <isin value="US912810RB61"/>
        </identifiers>
        <balance>118182000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>105329707.50000000</valUSD>
        <pctVal>0.638622285182</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2043-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02875000</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 BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 3.625% 08/15/43</title>
        <cusip>912810RC4</cusip>
        <identifiers>
          <isin value="US912810RC45"/>
        </identifiers>
        <balance>125692000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>126300820.63000000</valUSD>
        <pctVal>0.765771790366</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2043-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03625000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 3.125% 11/15/41</title>
        <cusip>912810QT8</cusip>
        <identifiers>
          <isin value="US912810QT88"/>
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        <balance>59163000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>55698728.88000000</valUSD>
        <pctVal>0.337705765669</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2041-11-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03125000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 3.25% 05/15/2042</title>
        <cusip>912810TH1</cusip>
        <identifiers>
          <isin value="US912810TH14"/>
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        <balance>241680000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>231182025.00000000</valUSD>
        <pctVal>1.401674765863</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2042-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.03250000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 2.5% 02/15/2046</title>
        <cusip>912810RQ3</cusip>
        <identifiers>
          <isin value="US912810RQ31"/>
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        <balance>117718000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>97039178.18000000</valUSD>
        <pctVal>0.588356155090</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2046-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>UNITED STATES TREASURY BOND 2.375% 02/15/2042</title>
        <cusip>912810TF5</cusip>
        <identifiers>
          <isin value="US912810TF57"/>
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        <balance>1538360000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>1272271870.67000000</valUSD>
        <pctVal>7.713884227962</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2042-02-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02375000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.375% 5/15/40</title>
        <cusip>912810QH4</cusip>
        <identifiers>
          <isin value="US912810QH41"/>
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        <balance>79923000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>90578359.14000000</valUSD>
        <pctVal>0.549183702062</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2040-05-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04375000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 4.5% 8/15/39</title>
        <cusip>912810QC5</cusip>
        <identifiers>
          <isin value="US912810QC53"/>
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        <balance>1044000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>1205738.44000000</valUSD>
        <pctVal>0.007310486814</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2039-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.04500000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
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        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
        <name>UNITED STATES TREASURY BOND</name>
        <lei>254900HROIFWPRGM1V77</lei>
        <title>USTB 2.25% 8/15/46</title>
        <cusip>912810RT7</cusip>
        <identifiers>
          <isin value="US912810RT79"/>
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        <balance>72841000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>57020845.31000000</valUSD>
        <pctVal>0.345721861374</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>DBT</assetCat>
        <issuerCat>UST</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <debtSec>
          <maturityDt>2046-08-15</maturityDt>
          <couponKind>Fixed</couponKind>
          <annualizedRt>0.02250000</annualizedRt>
          <isDefault>N</isDefault>
          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
          <isPaidKind>N</isPaidKind>
        </debtSec>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2022-09-30</ncom:dateSigned>
      <ncom:nameOfApplicant>Laura M. Del Prato</ncom:nameOfApplicant>
      <ncom:signature>Laura M. Del Prato</ncom:signature>
      <ncom:signerName>Laura M. Del Prato</ncom:signerName>
      <ncom:title>President and Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
