<?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>0001752724-24-049015</accessionNumber>
    <filerInfo>

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


      <seriesClassInfo>
        <seriesId>S000015882</seriesId>
        <classId>C000043618</classId>
        <classId>C000043619</classId>
        <classId>C000043620</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 High Yield Strategy Fund</seriesName>
      <seriesId>S000015882</seriesId>
      <seriesLei>SCQPAL0SXRZDT2DWGE91</seriesLei>
      <repPdEnd>2024-03-31</repPdEnd>
      <repPdDate>2023-12-31</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
    <fundInfo>
      <totAssets>8666251.86</totAssets>
      <totLiabs>21090.88</totLiabs>
      <netAssets>8645160.98</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>936534.36000000</cshNotRptdInCorD>
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      <isNonCashCollateral>N</isNonCashCollateral>
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        <monthlyTotReturns>
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            <mon3 netRealizedGain="-47147.04000000" netUnrealizedAppr="-130900.56000000"/>
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            <futureCategory>
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        <othMon2 netRealizedGain="0.00000000" netUnrealizedAppr="6089.07000000"/>
        <othMon3 netRealizedGain="0.00000000" netUnrealizedAppr="6932.54000000"/>
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      <varInfo>

        <fundsDesignatedInfo>
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          <indexIdentifier>LEH_HY</indexIdentifier>

        </fundsDesignatedInfo>

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    </fundInfo>
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        <invCountry>US</invCountry>
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        <fairValLevel>1</fairValLevel>
        <securityLending>
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          <isLoanByFund>N</isLoanByFund>
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        <name>Guggenheim Partners Investment Management LLC</name>
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        <fairValLevel>1</fairValLevel>
        <securityLending>
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        <descOthUnits>Notional Amount</descOthUnits>
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            <swapFlag>Y</swapFlag>
            <otherRecDesc fixedOrFloating="Other">CDX HY41 V2 5% 12/20/2028 - Tenor Quarterly</otherRecDesc>
            <fixedPmntDesc amount="0.00000000" curCd="USD" fixedOrFloating="Fixed" fixedRt="5.00000000"/>
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        <fairValLevel>2</fairValLevel>
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      </invstOrSec>
      <invstOrSec>
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    <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>
