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          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


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        <classId>C000010581</classId>
        <classId>C000010578</classId>
        <classId>C000010580</classId>
        <classId>C000010579</classId>
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    </filerInfo>
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      <regName>Rydex Series Funds</regName>
      <regFileNumber>811-07584</regFileNumber>
      <regCik>0000899148</regCik>
      <regLei>5493004D62WV1EDNTU07</regLei>
      <regStreet1>702 King Farm Blvd., Suite 200</regStreet1>
      <regCity>Rockville</regCity>
      <regStateConditional regCountry="US" regState="US-MD"/>
      <regZipOrPostalCode>20850</regZipOrPostalCode>
      <regPhone>301-296-5100</regPhone>
      <seriesName>Precious Metals Fund</seriesName>
      <seriesId>S000003798</seriesId>
      <seriesLei>549300HYX4F1PFGDBK11</seriesLei>
      <repPdEnd>2020-03-31</repPdEnd>
      <repPdDate>2019-09-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>137243.22</totLiabs>
      <netAssets>61451465.21</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
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      <standByCommit>0.00000000</standByCommit>
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      <borrowers>
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      <isNonCashCollateral>N</isNonCashCollateral>
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        <fairValLevel>3</fairValLevel>
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        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>AngloGold Ashanti Ltd</name>
        <lei>378900EF3BA9A5F42A59</lei>
        <title>AngloGold Ashanti Ltd.</title>
        <cusip>035128206</cusip>
        <identifiers>
          <isin value="US0351282068"/>
        </identifiers>
        <balance>136642.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2496449.34000000</valUSD>
        <pctVal>4.062473256689</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>ZA</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>BARCLAYS CAPITAL INC.</name>
        <lei>AC28XWWI3WIBK2824319</lei>
        <title>Barclays Capital</title>
        <cusip>N/A</cusip>
        <identifiers>
          <other otherDesc="Internal ID" value="REPO-BARC"/>
        </identifiers>
        <balance>848.15000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>848.15000000</valUSD>
        <pctVal>0.001380194918</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>RA</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <notClearedCentCparty isCleared="N">
            <counterpartyInfos>
              <counterpartyInfo lei="AC28XWWI3WIBK2824319" name="BARCLAYS CAPITAL INC."/>
            </counterpartyInfos>
          </notClearedCentCparty>
          <isTriParty>Y</isTriParty>
          <repurchaseRt>2.00000000</repurchaseRt>
          <maturityDt>2019-10-01</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
              <principalAmt>689.49000000</principalAmt>
              <principalCd>USD</principalCd>
              <collateralVal>865.11000000</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Pan American Silver Corp</name>
        <lei>549300MKTF5851TYIB83</lei>
        <title>Pan American Silver Corp.</title>
        <cusip>697900108</cusip>
        <identifiers>
          <isin value="CA6979001089"/>
        </identifiers>
        <balance>106534.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1670453.12000000</valUSD>
        <pctVal>2.718329195718</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>First Majestic Silver Corp</name>
        <lei>529900PWCU5DUH1DYR51</lei>
        <title>First Majestic Silver Corp.</title>
        <cusip>32076V103</cusip>
        <identifiers>
          <isin value="CA32076V1031"/>
        </identifiers>
        <balance>133788.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1216132.92000000</valUSD>
        <pctVal>1.979013707556</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="932206.77000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>MAG Silver Corp</name>
        <lei>254900LGL904N7F3EL14</lei>
        <title>MAG Silver Corp.</title>
        <cusip>55903Q104</cusip>
        <identifiers>
          <isin value="CA55903Q1046"/>
        </identifiers>
        <balance>84301.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>894433.61000000</valUSD>
        <pctVal>1.455512259867</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Seabridge Gold Inc</name>
        <lei>N/A</lei>
        <title>Seabridge Gold, Inc.</title>
        <cusip>811916105</cusip>
        <identifiers>
          <isin value="CA8119161054"/>
        </identifiers>
        <balance>63669.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>806049.54000000</valUSD>
        <pctVal>1.311684818653</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="536290.26000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Hecla Mining Co</name>
        <lei>5493009Y6HOBZD1QD537</lei>
        <title>Hecla Mining Co.</title>
        <cusip>422704106</cusip>
        <identifiers>
          <isin value="US4227041062"/>
        </identifiers>
        <balance>491706.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>865402.56000000</valUSD>
        <pctVal>1.408270017716</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Osisko Gold Royalties Ltd</name>
        <lei>549300TJZTXZMPQ6K004</lei>
        <title>Osisko Gold Royalties Ltd.</title>
        <cusip>68827L101</cusip>
        <identifiers>
          <isin value="CA68827L1013"/>
        </identifiers>
        <balance>103449.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>962075.70000000</valUSD>
        <pctVal>1.565586266677</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Yamana Gold Inc</name>
        <lei>549300WHE4O6UJ2KU013</lei>
        <title>Yamana Gold, Inc.</title>
        <cusip>98462Y100</cusip>
        <identifiers>
          <isin value="CA98462Y1007"/>
        </identifiers>
        <balance>499885.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1589634.30000000</valUSD>
        <pctVal>2.586812689604</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Novagold Resources Inc</name>
        <lei>529900587LVZTJ2BHS60</lei>
        <title>Novagold Resources, Inc.</title>
        <cusip>66987E206</cusip>
        <identifiers>
          <isin value="CA66987E2069"/>
        </identifiers>
        <balance>214906.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1304479.42000000</valUSD>
        <pctVal>2.122780011090</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Wheaton Precious Metals Corp</name>
        <lei>549300XSFG5ZCGVYD886</lei>
        <title>Wheaton Precious Metals Corp.</title>
        <cusip>962879102</cusip>
        <identifiers>
          <isin value="CA9628791027"/>
        </identifiers>
        <balance>121221.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>3180839.04000000</valUSD>
        <pctVal>5.176180957004</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Newmont Goldcorp Corp</name>
        <lei>549300VSP3RIX7FGDZ51</lei>
        <title>Newmont Goldcorp Corp.</title>
        <cusip>651639106</cusip>
        <identifiers>
          <isin value="US6516391066"/>
        </identifiers>
        <balance>136161.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>5163225.12000000</valUSD>
        <pctVal>8.402118814182</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>B2Gold Corp</name>
        <lei>549300F7OK456M5NLM05</lei>
        <title>B2Gold Corp.</title>
        <cusip>11777Q209</cusip>
        <identifiers>
          <isin value="CA11777Q2099"/>
        </identifiers>
        <balance>511952.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1653604.96000000</valUSD>
        <pctVal>2.690912176543</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Sandstorm Gold Ltd</name>
        <lei>549300QWJPV45VQF1B33</lei>
        <title>Sandstorm Gold Ltd.</title>
        <cusip>80013R206</cusip>
        <identifiers>
          <isin value="CA80013R2063"/>
        </identifiers>
        <balance>165469.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>933245.16000000</valUSD>
        <pctVal>1.518670314549</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="3632.16000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>SSR Mining Inc</name>
        <lei>549300JD2KR7AB9DYJ38</lei>
        <title>SSR Mining, Inc.</title>
        <cusip>784730103</cusip>
        <identifiers>
          <isin value="CA7847301032"/>
        </identifiers>
        <balance>86282.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1252814.64000000</valUSD>
        <pctVal>2.038705888816</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <loanByFundCondition isLoanByFund="Y" loanVal="455928.00000000"/>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Coeur Mining Inc</name>
        <lei>5493003AVK173D48DR70</lei>
        <title>Coeur Mining, Inc.</title>
        <cusip>192108504</cusip>
        <identifiers>
          <isin value="US1921085049"/>
        </identifiers>
        <balance>195426.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>939999.06000000</valUSD>
        <pctVal>1.529660939389</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>VanEck Vectors Junior Gold Min</name>
        <lei>549300P2HS5GYBL1ME59</lei>
        <title>VanEck Vectors Junior Gold Miners ETF</title>
        <cusip>92189F791</cusip>
        <identifiers>
          <isin value="US92189F7915"/>
        </identifiers>
        <balance>65941.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>2391020.66000000</valUSD>
        <pctVal>3.890909113117</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>RF</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>IAMGOLD Corp</name>
        <lei>254900E7II30XAB9LA72</lei>
        <title>IAMGOLD Corp.</title>
        <cusip>450913108</cusip>
        <identifiers>
          <isin value="CA4509131088"/>
        </identifiers>
        <balance>335145.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>1142844.45000000</valUSD>
        <pctVal>1.859751343754</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>

        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2019-10-30</ncom:dateSigned>
      <ncom:nameOfApplicant>Rydex Series Funds</ncom:nameOfApplicant>
      <ncom:signature>John Sullivan</ncom:signature>
      <ncom:signerName>John Sullivan</ncom:signerName>
      <ncom:title>CFO</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
