<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/nport" xmlns:com="http://www.sec.gov/edgar/common" xmlns:ncom="http://www.sec.gov/edgar/nportcommon" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sec.gov/edgar/nport eis_NPORT_Filer.xsd">
  <headerData>
    <submissionType>NPORT-P</submissionType>
    <isConfidential>false</isConfidential>
    <filerInfo>

      <filer>
        <issuerCredentials>
          <cik>0000899148</cik>
          <ccc>XXXXXXXX</ccc>
        </issuerCredentials>
      </filer>


      <seriesClassInfo>
        <seriesId>S000018292</seriesId>
        <classId>C000050425</classId>
        <classId>C000050426</classId>
        <classId>C000050427</classId>
      </seriesClassInfo>

    </filerInfo>
  </headerData>
  <formData>
    <genInfo>
      <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>Inverse Emerging Markets 2x Strategy Fund</seriesName>
      <seriesId>S000018292</seriesId>
      <seriesLei>549300XEOQTYPZN81706</seriesLei>
      <repPdEnd>2024-03-31</repPdEnd>
      <repPdDate>2023-09-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>517819.34</totAssets>
      <totLiabs>110892.41</totLiabs>
      <netAssets>406926.93</netAssets>
      <assetsAttrMiscSec>0.00000000</assetsAttrMiscSec>
      <assetsInvested>0.00000000</assetsInvested>
      <amtPayOneYrBanksBorr>0.00000000</amtPayOneYrBanksBorr>
      <amtPayOneYrCtrldComp>0.00000000</amtPayOneYrCtrldComp>
      <amtPayOneYrOthAffil>0.00000000</amtPayOneYrOthAffil>
      <amtPayOneYrOther>0.00000000</amtPayOneYrOther>
      <amtPayAftOneYrBanksBorr>0.00000000</amtPayAftOneYrBanksBorr>
      <amtPayAftOneYrCtrldComp>0.00000000</amtPayAftOneYrCtrldComp>
      <amtPayAftOneYrOthAffil>0.00000000</amtPayAftOneYrOthAffil>
      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
      <delayDeliv>0.00000000</delayDeliv>
      <standByCommit>0.00000000</standByCommit>
      <liquidPref>0.00000000</liquidPref>
      <cshNotRptdInCorD>1425.77000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
          <monthlyTotReturn classId="C000050425" rtn1="-16.35692500" rtn2="14.22223600" rtn3="9.88325200"/>
          <monthlyTotReturn classId="C000050426" rtn1="-16.35262000" rtn2="14.14415600" rtn3="9.94475300"/>
          <monthlyTotReturn classId="C000050427" rtn1="-16.31151900" rtn2="14.22298600" rtn3="9.68492800"/>
        </monthlyTotReturns>
        <monthlyReturnCats>
          <equityContracts>
            <mon1 netRealizedGain="-21132.90000000" netUnrealizedAppr="-52900.07000000"/>
            <mon2 netRealizedGain="-10776.17000000" netUnrealizedAppr="52596.90000000"/>
            <mon3 netRealizedGain="41147.75000000" netUnrealizedAppr="-7662.60000000"/>
            <swapCategory>
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              <instrMon2 netRealizedGain="-10776.17000000" netUnrealizedAppr="52596.90000000"/>
              <instrMon3 netRealizedGain="41147.75000000" netUnrealizedAppr="-7662.60000000"/>
            </swapCategory>
          </equityContracts>
        </monthlyReturnCats>
        <othMon1 netRealizedGain="0.00000000" netUnrealizedAppr="-0.01000000"/>
        <othMon2 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
        <othMon3 netRealizedGain="0.00000000" netUnrealizedAppr="0.00000000"/>
      </returnInfo>
      <mon1Flow redemption="2893773.93000000" reinvestment="0.00000000" sales="2721100.56000000"/>
      <mon2Flow redemption="2080956.74000000" reinvestment="0.00000000" sales="2328270.42000000"/>
      <mon3Flow redemption="2276972.75000000" reinvestment="0.00000000" sales="1973545.63000000"/>


      <varInfo>

        <fundsDesignatedInfo>
          <nameDesignatedIndex>BNY Mellon Emerging Markets 50 ADR Index</nameDesignatedIndex>
          <indexIdentifier>SPBKTEMG</indexIdentifier>

        </fundsDesignatedInfo>

      </varInfo>
    </fundInfo>
    <invstOrSecs>
      <invstOrSec>
        <name>BNP Paribas</name>
        <lei>R0MUWSFPU8MPRO8K5P83</lei>
        <title>S&amp;P Emerging 50 ADR Index</title>
        <cusip>N/A</cusip>
        <identifiers>
          <other otherDesc="Internal ID" value="BNPSWAP"/>
        </identifiers>
        <balance>-187.04310000</balance>
        <units>NC</units>
        <curCd>USD</curCd>
        <valUSD>5723.28000000</valUSD>
        <pctVal>1.406463809116</pctVal>
        <payoffProfile>N/A</payoffProfile>
        <assetCat>DE</assetCat>
        <issuerConditional desc="Derivative" issuerCat="OTHER"/>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <derivativeInfo>
          <swapDeriv derivCat="SWP">
            <counterparties>
              <counterpartyName>BNP Paribas</counterpartyName>
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            <descRefInstrmnt>
              <indexBasketInfo>
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                <indexIdentifier>N/A</indexIdentifier>
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            </descRefInstrmnt>
            <swapFlag>Y</swapFlag>
            <floatingRecDesc curCd="USD" fixedOrFloating="Floating" floatingRtIndex="FEDL01 Index" floatingRtSpread="-0.20000000" pmntAmt="0.00000000">
              <rtResetTenors>
                <rtResetTenor rateTenor="Month" rateTenorUnit="3" resetDt="Day" resetDtUnit="1"/>
              </rtResetTenors>
            </floatingRecDesc>
            <otherPmntDesc fixedOrFloating="Other">S&amp;P Emerging 50 ADR Index-Tenor Quarterly</otherPmntDesc>
            <terminationDt>2023-12-21</terminationDt>
            <upfrontPmnt>0.00000000</upfrontPmnt>
            <pmntCurCd>USD</pmntCurCd>
            <upfrontRcpt>0.00000000</upfrontRcpt>
            <rcptCurCd>USD</rcptCurCd>
            <notionalAmt>-467183.16000000</notionalAmt>
            <curCd>USD</curCd>
            <unrealizedAppr>5723.28000000</unrealizedAppr>
          </swapDeriv>
        </derivativeInfo>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Goldman Sachs International</name>
        <lei>W22LROWP2IHZNBB6K528</lei>
        <title>S&amp;P Emerging 50 ADR Index</title>
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        <identifiers>
          <other otherDesc="Internal ID" value="GSSWAP"/>
        </identifiers>
        <balance>-172.61720000</balance>
        <units>NC</units>
        <curCd>USD</curCd>
        <valUSD>4809.77000000</valUSD>
        <pctVal>1.181973874277</pctVal>
        <payoffProfile>N/A</payoffProfile>
        <assetCat>DE</assetCat>
        <issuerConditional desc="Derivative" issuerCat="OTHER"/>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <derivativeInfo>
          <swapDeriv derivCat="SWP">
            <counterparties>
              <counterpartyName>Goldman Sachs International</counterpartyName>
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            <descRefInstrmnt>
              <indexBasketInfo>
                <indexName>S&amp;P Emerging 50 ADR Index</indexName>
                <indexIdentifier>N/A</indexIdentifier>
              </indexBasketInfo>
            </descRefInstrmnt>
            <swapFlag>Y</swapFlag>
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              <rtResetTenors>
                <rtResetTenor rateTenor="Month" rateTenorUnit="3" resetDt="Day" resetDtUnit="1"/>
              </rtResetTenors>
            </floatingRecDesc>
            <otherPmntDesc fixedOrFloating="Other">S&amp;P Emerging 50 ADR Index-Tenor Quarterly</otherPmntDesc>
            <terminationDt>2023-12-21</terminationDt>
            <upfrontPmnt>0.00000000</upfrontPmnt>
            <pmntCurCd>USD</pmntCurCd>
            <upfrontRcpt>0.00000000</upfrontRcpt>
            <rcptCurCd>USD</rcptCurCd>
            <notionalAmt>-431151.16000000</notionalAmt>
            <curCd>USD</curCd>
            <unrealizedAppr>4809.77000000</unrealizedAppr>
          </swapDeriv>
        </derivativeInfo>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>BARCLAYS CAPITAL INC.</name>
        <lei>AC28XWWI3WIBK2824319</lei>
        <title>Barclays Capital, Inc.</title>
        <cusip>N/A</cusip>
        <identifiers>
          <other otherDesc="Internal ID" value="REPO-BARC"/>
        </identifiers>
        <balance>112189.55000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>112189.55000000</valUSD>
        <pctVal>27.56994972045</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>
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          <isTriParty>Y</isTriParty>
          <repurchaseRt>5.29000000</repurchaseRt>
          <maturityDt>2023-10-02</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
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              <principalCd>USD</principalCd>
              <collateralVal>114433.48000000</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>J.P. MORGAN SECURITIES LLC</name>
        <lei>ZBUT11V806EZRVTWT807</lei>
        <title>J.P. Morgan Securities LLC</title>
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        <identifiers>
          <other otherDesc="Internal ID" value="REPO-JP M"/>
        </identifiers>
        <balance>288812.08000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>288812.08000000</valUSD>
        <pctVal>70.97394119381</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="ZBUT11V806EZRVTWT807" name="J.P. MORGAN SECURITIES LLC"/>
            </counterpartyInfos>
          </notClearedCentCparty>
          <isTriParty>Y</isTriParty>
          <repurchaseRt>5.30000000</repurchaseRt>
          <maturityDt>2023-10-02</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
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              <principalCd>USD</principalCd>
              <collateralVal>294588.34000000</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>BOFA SECURITIES, INC.</name>
        <lei>549300HN4UKV1E2R3U73</lei>
        <title>BofA Securities, Inc.</title>
        <cusip>N/A</cusip>
        <identifiers>
          <other otherDesc="Internal ID" value="REPO-BANK"/>
        </identifiers>
        <balance>111081.57000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>111081.57000000</valUSD>
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        <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="549300HN4UKV1E2R3U73" name="BOFA SECURITIES, INC."/>
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          <isTriParty>Y</isTriParty>
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          <maturityDt>2023-10-02</maturityDt>
          <repurchaseCollaterals>
            <repurchaseCollateral>
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              <principalCd>USD</principalCd>
              <collateralVal>113303.27000000</collateralVal>
              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2023-10-30</ncom:dateSigned>
      <ncom:nameOfApplicant>Rydex Series Funds</ncom:nameOfApplicant>
      <ncom:signature>James Howley</ncom:signature>
      <ncom:signerName>James Howley</ncom:signerName>
      <ncom:title>CFO</ncom:title>
    </signature>
  </formData>
</edgarSubmission>
