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    <isConfidential>false</isConfidential>
    <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>2026-03-31</repPdEnd>
      <repPdDate>2025-06-30</repPdDate>
      <isFinalFiling>N</isFinalFiling>
    </genInfo>
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      <totLiabs>5050.96</totLiabs>
      <netAssets>775914.11</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>
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      <amtPayAftOneYrOther>0.00000000</amtPayAftOneYrOther>
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      <standByCommit>0.00000000</standByCommit>
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      <isNonCashCollateral>N</isNonCashCollateral>
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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>
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        <fairValLevel>2</fairValLevel>
        <debtSec>
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          <areIntrstPmntsInArrs>N</areIntrstPmntsInArrs>
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        <descOthUnits>Notional Amount</descOthUnits>
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        <fairValLevel>2</fairValLevel>
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    </invstOrSecs>
    <signature>
      <ncom:dateSigned>2025-07-30</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>
  <documents>XXXX</documents>
</edgarSubmission>
