<?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">
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    <isConfidential>false</isConfidential>
    <accessionNumber>0001752724-24-048558</accessionNumber>
    <filerInfo>

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


      <seriesClassInfo>
        <seriesId>S000018293</seriesId>
        <classId>C000050428</classId>
        <classId>C000050429</classId>
        <classId>C000050430</classId>
      </seriesClassInfo>

    </filerInfo>
  </headerData>
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    <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>Japan 2x Strategy Fund</seriesName>
      <seriesId>S000018293</seriesId>
      <seriesLei>549300TYQ6P1QBF6GR37</seriesLei>
      <repPdEnd>2024-03-31</repPdEnd>
      <repPdDate>2023-12-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>1331603.75</totAssets>
      <totLiabs>2986.15</totLiabs>
      <netAssets>1328617.60</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>44664.17000000</cshNotRptdInCorD>
      <isNonCashCollateral>N</isNonCashCollateral>
      <returnInfo>
        <monthlyTotReturns>
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            <mon3 netRealizedGain="88185.58000000" netUnrealizedAppr="-128825.55000000"/>
            <futureCategory>
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            <futureCategory>
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        </monthlyReturnCats>
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        <othMon2 netRealizedGain="0.00000000" netUnrealizedAppr="-12.39000000"/>
        <othMon3 netRealizedGain="0.00000000" netUnrealizedAppr="54.18000000"/>
      </returnInfo>
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      <mon3Flow redemption="1343605.67000000" reinvestment="71375.89000000" sales="1341915.39000000"/>


      <varInfo>

        <fundsDesignatedInfo>
          <nameDesignatedIndex>Nikkei 225 Stock Average</nameDesignatedIndex>
          <indexIdentifier>NIKJPYUSD</indexIdentifier>

        </fundsDesignatedInfo>

      </varInfo>
    </fundInfo>
    <invstOrSecs>
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        <cusip>912797HY6</cusip>
        <identifiers>
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        </identifiers>
        <balance>344000.00000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>343649.22000000</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>2024-01-09</maturityDt>
          <couponKind>None</couponKind>
          <annualizedRt>0.00000000</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>Chicago Mercantile Exchange</name>
        <lei>N/A</lei>
        <title>Japanese Yen Futures Contracts</title>
        <cusip>N/A</cusip>
        <identifiers>
          <ticker value="JYH4"/>
        </identifiers>
        <balance>30.00000000</balance>
        <units>NC</units>
        <curCd>USD</curCd>
        <valUSD>78876.08000000</valUSD>
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        <payoffProfile>N/A</payoffProfile>
        <assetCat>DFE</assetCat>
        <issuerConditional desc="Derivative" issuerCat="OTHER"/>
        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
        <derivativeInfo>
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            <counterparties>
              <counterpartyName>Goldman Sachs &amp; Co. LLC</counterpartyName>
              <counterpartyLei>FOR8UP27PHTHYVLBNG30</counterpartyLei>
            </counterparties>
            <payOffProf>Long</payOffProf>
            <descRefInstrmnt>
              <otherRefInst>
                <issuerName>N/A</issuerName>
                <issueTitle>Japanese Yen</issueTitle>
                <identifiers>
                  <cusip value="N/A"/>
                  <other otherDesc="Currency" value="Japanese Yen"/>
                </identifiers>
              </otherRefInst>
            </descRefInstrmnt>
            <expDate>2024-03-18</expDate>
            <notionalAmt>2612873.92000000</notionalAmt>
            <curCd>USD</curCd>
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        </derivativeInfo>
        <securityLending>
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      </invstOrSec>
      <invstOrSec>
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        <issuerConditional desc="Derivative" issuerCat="OTHER"/>
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        <fairValLevel>1</fairValLevel>
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            <descRefInstrmnt>
              <indexBasketInfo>
                <indexName>Nikkei 225</indexName>
                <indexIdentifier>JP9010C00002</indexIdentifier>
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            <unrealizedAppr>-4791.30000000</unrealizedAppr>
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        </derivativeInfo>
        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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      </invstOrSec>
      <invstOrSec>
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        <lei>549300HN4UKV1E2R3U73</lei>
        <title>BofA Securities, Inc.</title>
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        <invCountry>US</invCountry>
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        <fairValLevel>2</fairValLevel>
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          <transCat>Repurchase</transCat>
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            <counterpartyInfos>
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          <isTriParty>Y</isTriParty>
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          <maturityDt>2024-01-02</maturityDt>
          <repurchaseCollaterals>
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              <collateralCd>USD</collateralCd>
              <invstCat>UST</invstCat>
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      </invstOrSec>
      <invstOrSec>
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        <title>J.P. Morgan Securities LLC</title>
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          <other otherDesc="Internal ID" value="REPO-JP M"/>
        </identifiers>
        <balance>525054.20000000</balance>
        <units>PA</units>
        <curCd>USD</curCd>
        <valUSD>525054.20000000</valUSD>
        <pctVal>39.51883521639</pctVal>
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        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <repurchaseAgrmt>
          <transCat>Repurchase</transCat>
          <notClearedCentCparty isCleared="N">
            <counterpartyInfos>
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          <maturityDt>2024-01-02</maturityDt>
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              <collateralVal>535555.66000000</collateralVal>
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              <invstCat>UST</invstCat>
            </repurchaseCollateral>
          </repurchaseCollaterals>
        </repurchaseAgrmt>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2024-07-15</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>
  <documents>XXXX</documents>
</edgarSubmission>
