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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 7
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 42
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<PAGE> PAGE 43
066 F001000 N
066 G001000 N
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068 B001000 N
069 001000 N
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<PAGE> PAGE 44
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024 001100 N
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<PAGE> PAGE 45
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<PAGE> PAGE 46
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070 A021100 N
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<PAGE> PAGE 47
070 Q011100 N
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<PAGE> PAGE 48
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024 001200 N
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<PAGE> PAGE 49
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<PAGE> PAGE 50
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<PAGE> PAGE 51
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<PAGE> PAGE 52
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024 001300 Y
025 A001301 BEAR STEARNS COMPANIES, INC.
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<PAGE> PAGE 53
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<PAGE> PAGE 54
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<PAGE> PAGE 55
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<PAGE> PAGE 56
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SIGNATURE CHRISTOPHER G ROETZER
TITLE VP & PRIN ACCT OFFR
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND AGGRESSIVE GROWTH
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 061
<NAME> AGGRESSIVE GROWTH PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
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<RECEIVABLES> 1,200
<ASSETS-OTHER> 5
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<SHARES-COMMON-STOCK> 1,666
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<ACCUMULATED-NII-CURRENT> (4)
<OVERDISTRIBUTION-NII> 0
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<EXPENSES-NET> 636
<NET-INVESTMENT-INCOME> (382)
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<NET-CHANGE-FROM-OPS> 6,679
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
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<SHARES-REINVESTED> 932
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<ACCUMULATED-NII-PRIOR> (26)
<ACCUMULATED-GAINS-PRIOR> (248)
<OVERDISTRIB-NII-PRIOR> 0
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<PER-SHARE-NAV-BEGIN> 15.70
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<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND AGGRESSIVE GROWTH
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 062
<NAME> AGGRESSIVE GROWTH PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 34,516
<INVESTMENTS-AT-VALUE> 41,235
<RECEIVABLES> 1,200
<ASSETS-OTHER> 5
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 42,440
<PAYABLE-FOR-SECURITIES> 2,679
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<TOTAL-LIABILITIES> 2,832
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<PAID-IN-CAPITAL-COMMON> 31,634
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<SHARES-COMMON-PRIOR> 128
<ACCUMULATED-NII-CURRENT> (4)
<OVERDISTRIBUTION-NII> 0
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<NET-INVESTMENT-INCOME> (382)
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<DISTRIBUTIONS-OTHER> 0
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<SHARES-REINVESTED> 90
<NET-CHANGE-IN-ASSETS> 13,549
<ACCUMULATED-NII-PRIOR> (26)
<ACCUMULATED-GAINS-PRIOR> (248)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
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<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 829
<AVERAGE-NET-ASSETS> 3,307
<PER-SHARE-NAV-BEGIN> 15.58
<PER-SHARE-NII> (0.02)
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<PER-SHARE-NAV-END> 18.58
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<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND AGGRESSIVE GROWTH
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 063
<NAME> AGGRESSIVE GROWTH PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 34,516
<INVESTMENTS-AT-VALUE> 41,235
<RECEIVABLES> 1,200
<ASSETS-OTHER> 5
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 42,440
<PAYABLE-FOR-SECURITIES> 2,679
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 153
<TOTAL-LIABILITIES> 2,832
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 31,634
<SHARES-COMMON-STOCK> 186
<SHARES-COMMON-PRIOR> 137
<ACCUMULATED-NII-CURRENT> (4)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,259
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 6,719
<NET-ASSETS> 39,608
<DIVIDEND-INCOME> 195
<INTEREST-INCOME> 59
<OTHER-INCOME> 0
<EXPENSES-NET> 636
<NET-INVESTMENT-INCOME> (382)
<REALIZED-GAINS-CURRENT> 3,842
<APPREC-INCREASE-CURRENT> 3,219
<NET-CHANGE-FROM-OPS> 6,679
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 95
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,867
<NUMBER-OF-SHARES-REDEEMED> 1,078
<SHARES-REINVESTED> 95
<NET-CHANGE-IN-ASSETS> 13,549
<ACCUMULATED-NII-PRIOR> (26)
<ACCUMULATED-GAINS-PRIOR> (248)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 324
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 829
<AVERAGE-NET-ASSETS> 2,736
<PER-SHARE-NAV-BEGIN> 15.60
<PER-SHARE-NII> (0.01)
<PER-SHARE-GAIN-APPREC> 3.69
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.67
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 18.61
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND INTERNATIONAL EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 121
<NAME> INTERNATIONAL EQUITY PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 4,083
<INVESTMENTS-AT-VALUE> 4,014
<RECEIVABLES> 70
<ASSETS-OTHER> 30
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4,114
<PAYABLE-FOR-SECURITIES> 18
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 32
<TOTAL-LIABILITIES> 50
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,144
<SHARES-COMMON-STOCK> 291
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 21
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (31)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (70)
<NET-ASSETS> 4,064
<DIVIDEND-INCOME> 23
<INTEREST-INCOME> 10
<OTHER-INCOME> 0
<EXPENSES-NET> 32
<NET-INVESTMENT-INCOME> 1
<REALIZED-GAINS-CURRENT> (11)
<APPREC-INCREASE-CURRENT> (70)
<NET-CHANGE-FROM-OPS> (80)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,192
<NUMBER-OF-SHARES-REDEEMED> 84
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 4,064
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 18
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 160
<AVERAGE-NET-ASSETS> 1,951
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.01
<PER-SHARE-GAIN-APPREC> 0.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.57
<EXPENSE-RATIO> 1.70
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND INTERNATIONAL EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 122
<NAME> INTERNATIONAL EQUITY PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 4,083
<INVESTMENTS-AT-VALUE> 4,014
<RECEIVABLES> 70
<ASSETS-OTHER> 30
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4,114
<PAYABLE-FOR-SECURITIES> 18
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 32
<TOTAL-LIABILITIES> 50
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,144
<SHARES-COMMON-STOCK> 56
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 21
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (31)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (70)
<NET-ASSETS> 4,064
<DIVIDEND-INCOME> 23
<INTEREST-INCOME> 10
<OTHER-INCOME> 0
<EXPENSES-NET> 32
<NET-INVESTMENT-INCOME> 1
<REALIZED-GAINS-CURRENT> (11)
<APPREC-INCREASE-CURRENT> (70)
<NET-CHANGE-FROM-OPS> (80)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 647
<NUMBER-OF-SHARES-REDEEMED> 36
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 4,064
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 18
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 160
<AVERAGE-NET-ASSETS> 303
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> (0.04)
<PER-SHARE-GAIN-APPREC> 0.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.52
<EXPENSE-RATIO> 2.35
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND INTERNATIONAL EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 123
<NAME> INTERNATIONAL EQUITY PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 4,083
<INVESTMENTS-AT-VALUE> 4,014
<RECEIVABLES> 70
<ASSETS-OTHER> 30
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4,114
<PAYABLE-FOR-SECURITIES> 18
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 32
<TOTAL-LIABILITIES> 50
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 4,144
<SHARES-COMMON-STOCK> 38
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 21
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (31)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (70)
<NET-ASSETS> 4,064
<DIVIDEND-INCOME> 23
<INTEREST-INCOME> 10
<OTHER-INCOME> 0
<EXPENSES-NET> 32
<NET-INVESTMENT-INCOME> 1
<REALIZED-GAINS-CURRENT> (11)
<APPREC-INCREASE-CURRENT> (70)
<NET-CHANGE-FROM-OPS> (80)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 567
<NUMBER-OF-SHARES-REDEEMED> 142
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 4,064
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 18
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 160
<AVERAGE-NET-ASSETS> 146
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 0.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.53
<EXPENSE-RATIO> 2.25
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND CAPITAL APPRECIATION
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 071
<NAME> CAPITAL APPRECIATION PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 21,235
<INVESTMENTS-AT-VALUE> 24,812
<RECEIVABLES> 918
<ASSETS-OTHER> 76
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 25,806
<PAYABLE-FOR-SECURITIES> 438
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 146
<TOTAL-LIABILITIES> 584
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 20,985
<SHARES-COMMON-STOCK> 1,296
<SHARES-COMMON-PRIOR> 1,249
<ACCUMULATED-NII-CURRENT> (2)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 725
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,514
<NET-ASSETS> 25,222
<DIVIDEND-INCOME> 60
<INTEREST-INCOME> 78
<OTHER-INCOME> 0
<EXPENSES-NET> 469
<NET-INVESTMENT-INCOME> (331)
<REALIZED-GAINS-CURRENT> 778
<APPREC-INCREASE-CURRENT> 554
<NET-CHANGE-FROM-OPS> 1,001
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 271
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 33,846
<NUMBER-OF-SHARES-REDEEMED> 33,424
<SHARES-REINVESTED> 268
<NET-CHANGE-IN-ASSETS> 1,497
<ACCUMULATED-NII-PRIOR> (31)
<ACCUMULATED-GAINS-PRIOR> (27)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 239
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 662
<AVERAGE-NET-ASSETS> 19,392
<PER-SHARE-NAV-BEGIN> 15.49
<PER-SHARE-NII> 0.04
<PER-SHARE-GAIN-APPREC> 0.58
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.21
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.90
<EXPENSE-RATIO> 1.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND CAPITAL APPRECIATION
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 072
<NAME> CAPITAL APPRECIATION PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 21,235
<INVESTMENTS-AT-VALUE> 24,812
<RECEIVABLES> 918
<ASSETS-OTHER> 76
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 25,806
<PAYABLE-FOR-SECURITIES> 438
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 146
<TOTAL-LIABILITIES> 584
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 20,985
<SHARES-COMMON-STOCK> 182
<SHARES-COMMON-PRIOR> 138
<ACCUMULATED-NII-CURRENT> (2)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 725
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,514
<NET-ASSETS> 25,222
<DIVIDEND-INCOME> 60
<INTEREST-INCOME> 78
<OTHER-INCOME> 0
<EXPENSES-NET> 469
<NET-INVESTMENT-INCOME> (331)
<REALIZED-GAINS-CURRENT> 778
<APPREC-INCREASE-CURRENT> 554
<NET-CHANGE-FROM-OPS> 1,001
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 31
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,447
<NUMBER-OF-SHARES-REDEEMED> 827
<SHARES-REINVESTED> 31
<NET-CHANGE-IN-ASSETS> 1,497
<ACCUMULATED-NII-PRIOR> (31)
<ACCUMULATED-GAINS-PRIOR> (27)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 239
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 662
<AVERAGE-NET-ASSETS> 2,489
<PER-SHARE-NAV-BEGIN> 15.42
<PER-SHARE-NII> (0.05)
<PER-SHARE-GAIN-APPREC> 0.58
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.21
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.74
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND CAPITAL APPRECIATION
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 073
<NAME> CAPITAL APPRECIATION PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 21,235
<INVESTMENTS-AT-VALUE> 24,812
<RECEIVABLES> 918
<ASSETS-OTHER> 76
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 25,806
<PAYABLE-FOR-SECURITIES> 438
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 146
<TOTAL-LIABILITIES> 584
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 20,985
<SHARES-COMMON-STOCK> 111
<SHARES-COMMON-PRIOR> 145
<ACCUMULATED-NII-CURRENT> (2)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 725
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,514
<NET-ASSETS> 25,222
<DIVIDEND-INCOME> 60
<INTEREST-INCOME> 78
<OTHER-INCOME> 0
<EXPENSES-NET> 469
<NET-INVESTMENT-INCOME> (331)
<REALIZED-GAINS-CURRENT> 778
<APPREC-INCREASE-CURRENT> 554
<NET-CHANGE-FROM-OPS> 1,001
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 32
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 943
<NUMBER-OF-SHARES-REDEEMED> 1,485
<SHARES-REINVESTED> 31
<NET-CHANGE-IN-ASSETS> 1,497
<ACCUMULATED-NII-PRIOR> (31)
<ACCUMULATED-GAINS-PRIOR> (27)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 239
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 662
<AVERAGE-NET-ASSETS> 1,978
<PER-SHARE-NAV-BEGIN> 15.43
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 0.58
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.21
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.77
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND GLOBAL PORTFOLIO FOR
THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 041
<NAME> GLOBAL PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 250,215
<INVESTMENTS-AT-VALUE> 287,285
<RECEIVABLES> 10,328
<ASSETS-OTHER> 1,848
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 299,461
<PAYABLE-FOR-SECURITIES> 5,789
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,830
<TOTAL-LIABILITIES> 9,619
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 227,520
<SHARES-COMMON-STOCK> 9,212
<SHARES-COMMON-PRIOR> 6,349
<ACCUMULATED-NII-CURRENT> (16)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 26,581
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 35,757
<NET-ASSETS> 289,842
<DIVIDEND-INCOME> 2,560
<INTEREST-INCOME> 597
<OTHER-INCOME> 0
<EXPENSES-NET> 4,505
<NET-INVESTMENT-INCOME> (1,348)
<REALIZED-GAINS-CURRENT> 28,339
<APPREC-INCREASE-CURRENT> 13,215
<NET-CHANGE-FROM-OPS> 40,206
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 13,750
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 135,749
<NUMBER-OF-SHARES-REDEEMED> 87,573
<SHARES-REINVESTED> 13,478
<NET-CHANGE-IN-ASSETS> 139,415
<ACCUMULATED-NII-PRIOR> (153)
<ACCUMULATED-GAINS-PRIOR> 2,413
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,224
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,505
<AVERAGE-NET-ASSETS> 183,860
<PER-SHARE-NAV-BEGIN> 21.39
<PER-SHARE-NII> 0.07
<PER-SHARE-GAIN-APPREC> 4.38
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 2.10
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 23.74
<EXPENSE-RATIO> 1.92
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND GLOBAL PORTFOLIO FOR
THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 042
<NAME> GLOBAL PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 250,215
<INVESTMENTS-AT-VALUE> 287,285
<RECEIVABLES> 10,328
<ASSETS-OTHER> 1,848
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 299,461
<PAYABLE-FOR-SECURITIES> 5,789
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,830
<TOTAL-LIABILITIES> 9,619
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 227,520
<SHARES-COMMON-STOCK> 1,880
<SHARES-COMMON-PRIOR> 282
<ACCUMULATED-NII-CURRENT> (16)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 26,581
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 35,757
<NET-ASSETS> 289,842
<DIVIDEND-INCOME> 2,560
<INTEREST-INCOME> 597
<OTHER-INCOME> 0
<EXPENSES-NET> 4,505
<NET-INVESTMENT-INCOME> (1,348)
<REALIZED-GAINS-CURRENT> 28,339
<APPREC-INCREASE-CURRENT> 13,215
<NET-CHANGE-FROM-OPS> 40,206
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 762
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 36,594
<NUMBER-OF-SHARES-REDEEMED> 1,307
<SHARES-REINVESTED> 737
<NET-CHANGE-IN-ASSETS> 139,415
<ACCUMULATED-NII-PRIOR> (153)
<ACCUMULATED-GAINS-PRIOR> 2,413
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,224
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,505
<AVERAGE-NET-ASSETS> 22,085
<PER-SHARE-NAV-BEGIN> 21.13
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 4.38
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 2.10
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 23.38
<EXPENSE-RATIO> 2.56
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND GLOBAL PORTFOLIO FOR
THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 043
<NAME> GLOBAL PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 250,215
<INVESTMENTS-AT-VALUE> 287,285
<RECEIVABLES> 10,328
<ASSETS-OTHER> 1,848
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 299,461
<PAYABLE-FOR-SECURITIES> 5,789
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,830
<TOTAL-LIABILITIES> 9,619
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 227,520
<SHARES-COMMON-STOCK> 1,168
<SHARES-COMMON-PRIOR> 410
<ACCUMULATED-NII-CURRENT> (16)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 26,581
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 35,757
<NET-ASSETS> 289,842
<DIVIDEND-INCOME> 2,560
<INTEREST-INCOME> 597
<OTHER-INCOME> 0
<EXPENSES-NET> 4,505
<NET-INVESTMENT-INCOME> (1,348)
<REALIZED-GAINS-CURRENT> 28,339
<APPREC-INCREASE-CURRENT> 13,215
<NET-CHANGE-FROM-OPS> 40,206
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 956
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 18,979
<NUMBER-OF-SHARES-REDEEMED> 2,934
<SHARES-REINVESTED> 954
<NET-CHANGE-IN-ASSETS> 139,415
<ACCUMULATED-NII-PRIOR> (153)
<ACCUMULATED-GAINS-PRIOR> 2,413
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,224
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 4,505
<AVERAGE-NET-ASSETS> 16,841
<PER-SHARE-NAV-BEGIN> 21.03
<PER-SHARE-NII> (0.01)
<PER-SHARE-GAIN-APPREC> 4.38
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 2.10
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 23.30
<EXPENSE-RATIO> 2.46
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND GROWTH PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 011
<NAME> GROWTH PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 896,065
<INVESTMENTS-AT-VALUE> 1,243,705
<RECEIVABLES> 6,549
<ASSETS-OTHER> 453
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,250,707
<PAYABLE-FOR-SECURITIES> 281
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,412
<TOTAL-LIABILITIES> 5,693
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 734,950
<SHARES-COMMON-STOCK> 24,541
<SHARES-COMMON-PRIOR> 25,720
<ACCUMULATED-NII-CURRENT> 713
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 163,620
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 345,731
<NET-ASSETS> 1,245,014
<DIVIDEND-INCOME> 9,837
<INTEREST-INCOME> 8,686
<OTHER-INCOME> 0
<EXPENSES-NET> 17,814
<NET-INVESTMENT-INCOME> 709
<REALIZED-GAINS-CURRENT> 164,142
<APPREC-INCREASE-CURRENT> 19,578
<NET-CHANGE-FROM-OPS> 184,429
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 11,899
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 167,262
<NUMBER-OF-SHARES-REDEEMED> 207,496
<SHARES-REINVESTED> 11,526
<NET-CHANGE-IN-ASSETS> 89,840
<ACCUMULATED-NII-PRIOR> 34
<ACCUMULATED-GAINS-PRIOR> 18,010
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 11,677
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 17,814
<AVERAGE-NET-ASSETS> 602,378
<PER-SHARE-NAV-BEGIN> 21.97
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> 3.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.47
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 25.04
<EXPENSE-RATIO> 1.61
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND GROWTH PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 012
<NAME> GROWTH PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 896,065
<INVESTMENTS-AT-VALUE> 1,243,705
<RECEIVABLES> 6,549
<ASSETS-OTHER> 453
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,250,707
<PAYABLE-FOR-SECURITIES> 281
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,412
<TOTAL-LIABILITIES> 5,693
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 734,950
<SHARES-COMMON-STOCK> 531
<SHARES-COMMON-PRIOR> 243
<ACCUMULATED-NII-CURRENT> 713
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 163,620
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 345,731
<NET-ASSETS> 1,245,014
<DIVIDEND-INCOME> 9,837
<INTEREST-INCOME> 8,686
<OTHER-INCOME> 0
<EXPENSES-NET> 17,814
<NET-INVESTMENT-INCOME> 709
<REALIZED-GAINS-CURRENT> 164,142
<APPREC-INCREASE-CURRENT> 19,578
<NET-CHANGE-FROM-OPS> 184,429
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 130
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,645
<NUMBER-OF-SHARES-REDEEMED> 1,121
<SHARES-REINVESTED> 127
<NET-CHANGE-IN-ASSETS> 89,840
<ACCUMULATED-NII-PRIOR> 34
<ACCUMULATED-GAINS-PRIOR> 18,010
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 11,677
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 17,814
<AVERAGE-NET-ASSETS> 9,283
<PER-SHARE-NAV-BEGIN> 21.60
<PER-SHARE-NII> (0.14)
<PER-SHARE-GAIN-APPREC> 3.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.47
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 24.55
<EXPENSE-RATIO> 2.26
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND GROWTH PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 013
<NAME> GROWTH PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 896,065
<INVESTMENTS-AT-VALUE> 1,243,705
<RECEIVABLES> 6,549
<ASSETS-OTHER> 453
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,250,707
<PAYABLE-FOR-SECURITIES> 281
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,412
<TOTAL-LIABILITIES> 5,693
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 734,950
<SHARES-COMMON-STOCK> 581
<SHARES-COMMON-PRIOR> 509
<ACCUMULATED-NII-CURRENT> 713
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 163,620
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 345,731
<NET-ASSETS> 1,245,014
<DIVIDEND-INCOME> 9,837
<INTEREST-INCOME> 8,686
<OTHER-INCOME> 0
<EXPENSES-NET> 17,814
<NET-INVESTMENT-INCOME> 709
<REALIZED-GAINS-CURRENT> 164,142
<APPREC-INCREASE-CURRENT> 19,578
<NET-CHANGE-FROM-OPS> 184,429
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 256
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,873
<NUMBER-OF-SHARES-REDEEMED> 5,543
<SHARES-REINVESTED> 252
<NET-CHANGE-IN-ASSETS> 89,840
<ACCUMULATED-NII-PRIOR> 34
<ACCUMULATED-GAINS-PRIOR> 18,010
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 11,677
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 17,814
<AVERAGE-NET-ASSETS> 13,413
<PER-SHARE-NAV-BEGIN> 21.65
<PER-SHARE-NII> (0.12)
<PER-SHARE-GAIN-APPREC> 3.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.47
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 24.62
<EXPENSE-RATIO> 2.16
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND GROWTH PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 014
<NAME> GROWTH PORTFOLIO/CLASS T
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 896,065
<INVESTMENTS-AT-VALUE> 1,243,705
<RECEIVABLES> 6,549
<ASSETS-OTHER> 453
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,250,707
<PAYABLE-FOR-SECURITIES> 281
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,412
<TOTAL-LIABILITIES> 5,693
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 734,950
<SHARES-COMMON-STOCK> 23,833
<SHARES-COMMON-PRIOR> 25,887
<ACCUMULATED-NII-CURRENT> 713
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 163,620
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 345,731
<NET-ASSETS> 1,245,014
<DIVIDEND-INCOME> 9,837
<INTEREST-INCOME> 8,686
<OTHER-INCOME> 0
<EXPENSES-NET> 17,814
<NET-INVESTMENT-INCOME> 709
<REALIZED-GAINS-CURRENT> 164,142
<APPREC-INCREASE-CURRENT> 19,578
<NET-CHANGE-FROM-OPS> 184,429
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 11,980
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 36,454
<NUMBER-OF-SHARES-REDEEMED> 98,115
<SHARES-REINVESTED> 11,812
<NET-CHANGE-IN-ASSETS> 89,840
<ACCUMULATED-NII-PRIOR> 34
<ACCUMULATED-GAINS-PRIOR> 18,010
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 11,677
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 17,814
<AVERAGE-NET-ASSETS> 601,839
<PER-SHARE-NAV-BEGIN> 22.17
<PER-SHARE-NII> 0.05
<PER-SHARE-GAIN-APPREC> 3.56
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.47
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 25.31
<EXPENSE-RATIO> 1.26
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND C.A.S.E. PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 111
<NAME> C.A.S.E. PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 8,228
<INVESTMENTS-AT-VALUE> 8,796
<RECEIVABLES> 165
<ASSETS-OTHER> 163
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9,124
<PAYABLE-FOR-SECURITIES> 691
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 48
<TOTAL-LIABILITIES> 739
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7,258
<SHARES-COMMON-STOCK> 304
<SHARES-COMMON-PRIOR> 158
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 559
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 568
<NET-ASSETS> 8,384
<DIVIDEND-INCOME> 54
<INTEREST-INCOME> 27
<OTHER-INCOME> 0
<EXPENSES-NET> 117
<NET-INVESTMENT-INCOME> (36)
<REALIZED-GAINS-CURRENT> 774
<APPREC-INCREASE-CURRENT> 444
<NET-CHANGE-FROM-OPS> 1,182
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 89
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,482
<NUMBER-OF-SHARES-REDEEMED> 794
<SHARES-REINVESTED> 87
<NET-CHANGE-IN-ASSETS> 4,863
<ACCUMULATED-NII-PRIOR> (1)
<ACCUMULATED-GAINS-PRIOR> 12
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 54
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 267
<AVERAGE-NET-ASSETS> 2,560
<PER-SHARE-NAV-BEGIN> 10.56
<PER-SHARE-NII> (0.01)
<PER-SHARE-GAIN-APPREC> 2.86
<PER-SHARE-DIVIDEND> 0.51
<PER-SHARE-DISTRIBUTIONS> 0.51
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.90
<EXPENSE-RATIO> 1.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND C.A.S.E. PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 112
<NAME> C.A.S.E. PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 8,228
<INVESTMENTS-AT-VALUE> 8,796
<RECEIVABLES> 165
<ASSETS-OTHER> 163
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9,124
<PAYABLE-FOR-SECURITIES> 691
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 48
<TOTAL-LIABILITIES> 739
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7,258
<SHARES-COMMON-STOCK> 190
<SHARES-COMMON-PRIOR> 110
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 559
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 568
<NET-ASSETS> 8,384
<DIVIDEND-INCOME> 54
<INTEREST-INCOME> 27
<OTHER-INCOME> 0
<EXPENSES-NET> 117
<NET-INVESTMENT-INCOME> (36)
<REALIZED-GAINS-CURRENT> 774
<APPREC-INCREASE-CURRENT> 444
<NET-CHANGE-FROM-OPS> 1,182
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 45
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,352
<NUMBER-OF-SHARES-REDEEMED> 439
<SHARES-REINVESTED> 44
<NET-CHANGE-IN-ASSETS> 4,863
<ACCUMULATED-NII-PRIOR> (1)
<ACCUMULATED-GAINS-PRIOR> 12
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 54
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 267
<AVERAGE-NET-ASSETS> 1,608
<PER-SHARE-NAV-BEGIN> 10.51
<PER-SHARE-NII> (0.07)
<PER-SHARE-GAIN-APPREC> 2.86
<PER-SHARE-DIVIDEND> 0.45
<PER-SHARE-DISTRIBUTIONS> 0.45
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.85
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND C.A.S.E. PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 113
<NAME> C.A.S.E. PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 8,228
<INVESTMENTS-AT-VALUE> 8,796
<RECEIVABLES> 165
<ASSETS-OTHER> 163
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9,124
<PAYABLE-FOR-SECURITIES> 691
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 48
<TOTAL-LIABILITIES> 739
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 7,258
<SHARES-COMMON-STOCK> 158
<SHARES-COMMON-PRIOR> 65
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 559
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 568
<NET-ASSETS> 8,384
<DIVIDEND-INCOME> 54
<INTEREST-INCOME> 27
<OTHER-INCOME> 0
<EXPENSES-NET> 117
<NET-INVESTMENT-INCOME> (36)
<REALIZED-GAINS-CURRENT> 774
<APPREC-INCREASE-CURRENT> 444
<NET-CHANGE-FROM-OPS> 1,182
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 42
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,821
<NUMBER-OF-SHARES-REDEEMED> 738
<SHARES-REINVESTED> 42
<NET-CHANGE-IN-ASSETS> 4,863
<ACCUMULATED-NII-PRIOR> (1)
<ACCUMULATED-GAINS-PRIOR> 12
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 54
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 267
<AVERAGE-NET-ASSETS> 1,246
<PER-SHARE-NAV-BEGIN> 10.52
<PER-SHARE-NII> (0.06)
<PER-SHARE-GAIN-APPREC> 2.86
<PER-SHARE-DIVIDEND> 0.46
<PER-SHARE-DISTRIBUTIONS> 0.46
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.86
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND VALUE EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 131
<NAME> VALUE EQUITY PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 8,997
<INVESTMENTS-AT-VALUE> 9,670
<RECEIVABLES> 110
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9,784
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 22
<TOTAL-LIABILITIES> 22
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 9,048
<SHARES-COMMON-STOCK> 453
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 4
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 674
<NET-ASSETS> 9,762
<DIVIDEND-INCOME> 39
<INTEREST-INCOME> 38
<OTHER-INCOME> 0
<EXPENSES-NET> 73
<NET-INVESTMENT-INCOME> 4
<REALIZED-GAINS-CURRENT> 36
<APPREC-INCREASE-CURRENT> 674
<NET-CHANGE-FROM-OPS> 714
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,686
<NUMBER-OF-SHARES-REDEEMED> 799
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 9,762
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 41
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 178
<AVERAGE-NET-ASSETS> 3,097
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> 0.02
<PER-SHARE-GAIN-APPREC> 1.69
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.71
<EXPENSE-RATIO> 1.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND VALUE EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 132
<NAME> VALUE EQUITY PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 8,997
<INVESTMENTS-AT-VALUE> 9,670
<RECEIVABLES> 110
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9,784
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 22
<TOTAL-LIABILITIES> 22
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 9,048
<SHARES-COMMON-STOCK> 244
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 4
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 674
<NET-ASSETS> 9,762
<DIVIDEND-INCOME> 39
<INTEREST-INCOME> 38
<OTHER-INCOME> 0
<EXPENSES-NET> 73
<NET-INVESTMENT-INCOME> 4
<REALIZED-GAINS-CURRENT> 36
<APPREC-INCREASE-CURRENT> 674
<NET-CHANGE-FROM-OPS> 714
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,700
<NUMBER-OF-SHARES-REDEEMED> 54
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 9,762
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 41
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 178
<AVERAGE-NET-ASSETS> 1,617
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> 1.69
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.67
<EXPENSE-RATIO> 2.15
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND VALUE EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 133
<NAME> VALUE EQUITY PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 8,997
<INVESTMENTS-AT-VALUE> 9,670
<RECEIVABLES> 110
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 9,784
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 22
<TOTAL-LIABILITIES> 22
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 9,048
<SHARES-COMMON-STOCK> 138
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 4
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 36
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 674
<NET-ASSETS> 9,762
<DIVIDEND-INCOME> 39
<INTEREST-INCOME> 38
<OTHER-INCOME> 0
<EXPENSES-NET> 73
<NET-INVESTMENT-INCOME> 4
<REALIZED-GAINS-CURRENT> 36
<APPREC-INCREASE-CURRENT> 674
<NET-CHANGE-FROM-OPS> 714
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,708
<NUMBER-OF-SHARES-REDEEMED> 193
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 9,762
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 41
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 178
<AVERAGE-NET-ASSETS> 835
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> 1.69
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.67
<EXPENSE-RATIO> 2.05
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND STRATEGIC TOTAL
RETURN PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 081
<NAME> STRATEGIC TOTAL RETURN PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 26,310
<INVESTMENTS-AT-VALUE> 30,340
<RECEIVABLES> 491
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 30,835
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 176
<TOTAL-LIABILITIES> 176
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 25,334
<SHARES-COMMON-STOCK> 1,360
<SHARES-COMMON-PRIOR> 875
<ACCUMULATED-NII-CURRENT> 70
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,224
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,031
<NET-ASSETS> 30,659
<DIVIDEND-INCOME> 329
<INTEREST-INCOME> 401
<OTHER-INCOME> 0
<EXPENSES-NET> 449
<NET-INVESTMENT-INCOME> 281
<REALIZED-GAINS-CURRENT> 1,228
<APPREC-INCREASE-CURRENT> 2,713
<NET-CHANGE-FROM-OPS> 4,222
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 207
<DISTRIBUTIONS-OF-GAINS> 291
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9,130
<NUMBER-OF-SHARES-REDEEMED> 2,459
<SHARES-REINVESTED> 490
<NET-CHANGE-IN-ASSETS> 15,439
<ACCUMULATED-NII-PRIOR> 17
<ACCUMULATED-GAINS-PRIOR> 36
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 224
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 545
<AVERAGE-NET-ASSETS> 16,605
<PER-SHARE-NAV-BEGIN> 13.43
<PER-SHARE-NII> 0.20
<PER-SHARE-GAIN-APPREC> 2.79
<PER-SHARE-DIVIDEND> 0.19
<PER-SHARE-DISTRIBUTIONS> 0.51
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.91
<EXPENSE-RATIO> 1.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND STRATEGIC TOTAL
RETURN PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 082
<NAME> STRATEGIC TOTAL RETURN PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 26,310
<INVESTMENTS-AT-VALUE> 30,340
<RECEIVABLES> 491
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 30,835
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 176
<TOTAL-LIABILITIES> 176
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 25,334
<SHARES-COMMON-STOCK> 296
<SHARES-COMMON-PRIOR> 125
<ACCUMULATED-NII-CURRENT> 70
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,224
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,031
<NET-ASSETS> 30,659
<DIVIDEND-INCOME> 329
<INTEREST-INCOME> 401
<OTHER-INCOME> 0
<EXPENSES-NET> 449
<NET-INVESTMENT-INCOME> 281
<REALIZED-GAINS-CURRENT> 1,228
<APPREC-INCREASE-CURRENT> 2,713
<NET-CHANGE-FROM-OPS> 4,222
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 18
<DISTRIBUTIONS-OF-GAINS> 43
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,958
<NUMBER-OF-SHARES-REDEEMED> 444
<SHARES-REINVESTED> 60
<NET-CHANGE-IN-ASSETS> 15,439
<ACCUMULATED-NII-PRIOR> 17
<ACCUMULATED-GAINS-PRIOR> 36
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 224
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 545
<AVERAGE-NET-ASSETS> 2,923
<PER-SHARE-NAV-BEGIN> 13.42
<PER-SHARE-NII> 0.10
<PER-SHARE-GAIN-APPREC> 2.79
<PER-SHARE-DIVIDEND> 0.10
<PER-SHARE-DISTRIBUTIONS> 0.42
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.89
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND STRATEGIC TOTAL
RETURN PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 083
<NAME> STRATEGIC TOTAL RETURN PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 26,310
<INVESTMENTS-AT-VALUE> 30,340
<RECEIVABLES> 491
<ASSETS-OTHER> 4
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 30,835
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 176
<TOTAL-LIABILITIES> 176
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 25,334
<SHARES-COMMON-STOCK> 273
<SHARES-COMMON-PRIOR> 133
<ACCUMULATED-NII-CURRENT> 70
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,224
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,031
<NET-ASSETS> 30,659
<DIVIDEND-INCOME> 329
<INTEREST-INCOME> 401
<OTHER-INCOME> 0
<EXPENSES-NET> 449
<NET-INVESTMENT-INCOME> 281
<REALIZED-GAINS-CURRENT> 1,228
<APPREC-INCREASE-CURRENT> 2,713
<NET-CHANGE-FROM-OPS> 4,222
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 20
<DISTRIBUTIONS-OF-GAINS> 45
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,996
<NUMBER-OF-SHARES-REDEEMED> 955
<SHARES-REINVESTED> 65
<NET-CHANGE-IN-ASSETS> 15,439
<ACCUMULATED-NII-PRIOR> 17
<ACCUMULATED-GAINS-PRIOR> 36
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 224
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 545
<AVERAGE-NET-ASSETS> 2,860
<PER-SHARE-NAV-BEGIN> 13.42
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 2.79
<PER-SHARE-DIVIDEND> 0.11
<PER-SHARE-DISTRIBUTIONS> 0.43
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 15.90
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND TACTICAL ASSET
ALLOCATION PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997,
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 101
<NAME> TACTICAL ASSET ALLOCATION PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 24,399
<INVESTMENTS-AT-VALUE> 26,996
<RECEIVABLES> 248
<ASSETS-OTHER> 2
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 27,246
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 120
<TOTAL-LIABILITIES> 120
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,915
<SHARES-COMMON-STOCK> 932
<SHARES-COMMON-PRIOR> 750
<ACCUMULATED-NII-CURRENT> 62
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,552
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,597
<NET-ASSETS> 27,126
<DIVIDEND-INCOME> 193
<INTEREST-INCOME> 560
<OTHER-INCOME> 0
<EXPENSES-NET> 478
<NET-INVESTMENT-INCOME> 275
<REALIZED-GAINS-CURRENT> 1,555
<APPREC-INCREASE-CURRENT> 1,892
<NET-CHANGE-FROM-OPS> 3,722
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 138
<DISTRIBUTIONS-OF-GAINS> 30
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,308
<NUMBER-OF-SHARES-REDEEMED> 4,180
<SHARES-REINVESTED> 163
<NET-CHANGE-IN-ASSETS> 8,959
<ACCUMULATED-NII-PRIOR> 14
<ACCUMULATED-GAINS-PRIOR> 14
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 220
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 577
<AVERAGE-NET-ASSETS> 10,378
<PER-SHARE-NAV-BEGIN> 11.19
<PER-SHARE-NII> 0.19
<PER-SHARE-GAIN-APPREC> 2.02
<PER-SHARE-DIVIDEND> 0.17
<PER-SHARE-DISTRIBUTIONS> 0.21
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.19
<EXPENSE-RATIO> 1.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND TACTICAL ASSET
ALLOCATION PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997,
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 102
<NAME> TACTICAL ASSET ALLOCATION PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 24,399
<INVESTMENTS-AT-VALUE> 26,996
<RECEIVABLES> 248
<ASSETS-OTHER> 2
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 27,246
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 120
<TOTAL-LIABILITIES> 120
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,915
<SHARES-COMMON-STOCK> 740
<SHARES-COMMON-PRIOR> 449
<ACCUMULATED-NII-CURRENT> 62
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,552
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,597
<NET-ASSETS> 27,126
<DIVIDEND-INCOME> 193
<INTEREST-INCOME> 560
<OTHER-INCOME> 0
<EXPENSES-NET> 478
<NET-INVESTMENT-INCOME> 275
<REALIZED-GAINS-CURRENT> 1,555
<APPREC-INCREASE-CURRENT> 1,892
<NET-CHANGE-FROM-OPS> 3,722
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 54
<DISTRIBUTIONS-OF-GAINS> 18
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,885
<NUMBER-OF-SHARES-REDEEMED> 1,379
<SHARES-REINVESTED> 72
<NET-CHANGE-IN-ASSETS> 8,959
<ACCUMULATED-NII-PRIOR> 14
<ACCUMULATED-GAINS-PRIOR> 14
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 220
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 577
<AVERAGE-NET-ASSETS> 7,447
<PER-SHARE-NAV-BEGIN> 11.18
<PER-SHARE-NII> 0.11
<PER-SHARE-GAIN-APPREC> 2.02
<PER-SHARE-DIVIDEND> 0.09
<PER-SHARE-DISTRIBUTIONS> 0.13
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.18
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND TACTICAL ASSET
ALLOCATION PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997,
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 103
<NAME> TACTICAL ASSET ALLOCATION PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 24,399
<INVESTMENTS-AT-VALUE> 26,996
<RECEIVABLES> 248
<ASSETS-OTHER> 2
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 27,246
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 120
<TOTAL-LIABILITIES> 120
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,915
<SHARES-COMMON-STOCK> 386
<SHARES-COMMON-PRIOR> 425
<ACCUMULATED-NII-CURRENT> 62
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,552
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,597
<NET-ASSETS> 27,126
<DIVIDEND-INCOME> 193
<INTEREST-INCOME> 560
<OTHER-INCOME> 0
<EXPENSES-NET> 478
<NET-INVESTMENT-INCOME> 275
<REALIZED-GAINS-CURRENT> 1,555
<APPREC-INCREASE-CURRENT> 1,892
<NET-CHANGE-FROM-OPS> 3,722
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 35
<DISTRIBUTIONS-OF-GAINS> 17
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,406
<NUMBER-OF-SHARES-REDEEMED> 3,798
<SHARES-REINVESTED> 52
<NET-CHANGE-IN-ASSETS> 8,959
<ACCUMULATED-NII-PRIOR> 14
<ACCUMULATED-GAINS-PRIOR> 14
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 220
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 577
<AVERAGE-NET-ASSETS> 4,215
<PER-SHARE-NAV-BEGIN> 11.18
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 2.02
<PER-SHARE-DIVIDEND> 0.10
<PER-SHARE-DISTRIBUTIONS> 0.14
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.18
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND BALANCED PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 091
<NAME> BALANCED PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,762
<INVESTMENTS-AT-VALUE> 17,291
<RECEIVABLES> 843
<ASSETS-OTHER> 42
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 18,176
<PAYABLE-FOR-SECURITIES> 503
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 115
<TOTAL-LIABILITIES> 618
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 14,316
<SHARES-COMMON-STOCK> 935
<SHARES-COMMON-PRIOR> 619
<ACCUMULATED-NII-CURRENT> 23
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,715
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,504
<NET-ASSETS> 17,558
<DIVIDEND-INCOME> 126
<INTEREST-INCOME> 295
<OTHER-INCOME> 0
<EXPENSES-NET> 266
<NET-INVESTMENT-INCOME> 155
<REALIZED-GAINS-CURRENT> 1,751
<APPREC-INCREASE-CURRENT> 876
<NET-CHANGE-FROM-OPS> 2,782
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 155
<DISTRIBUTIONS-OF-GAINS> 1,109
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,647
<NUMBER-OF-SHARES-REDEEMED> 1,816
<SHARES-REINVESTED> 1,251
<NET-CHANGE-IN-ASSETS> 7,311
<ACCUMULATED-NII-PRIOR> 15
<ACCUMULATED-GAINS-PRIOR> 74
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 134
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 405
<AVERAGE-NET-ASSETS> 10,539
<PER-SHARE-NAV-BEGIN> 13.58
<PER-SHARE-NII> 0.19
<PER-SHARE-GAIN-APPREC> 2.52
<PER-SHARE-DIVIDEND> 0.20
<PER-SHARE-DISTRIBUTIONS> 1.95
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.34
<EXPENSE-RATIO> 1.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND BALANCED PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 092
<NAME> BALANCED PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,762
<INVESTMENTS-AT-VALUE> 17,291
<RECEIVABLES> 843
<ASSETS-OTHER> 42
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 18,176
<PAYABLE-FOR-SECURITIES> 503
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 115
<TOTAL-LIABILITIES> 618
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 14,316
<SHARES-COMMON-STOCK> 180
<SHARES-COMMON-PRIOR> 65
<ACCUMULATED-NII-CURRENT> 23
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,715
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,504
<NET-ASSETS> 17,558
<DIVIDEND-INCOME> 126
<INTEREST-INCOME> 295
<OTHER-INCOME> 0
<EXPENSES-NET> 266
<NET-INVESTMENT-INCOME> 155
<REALIZED-GAINS-CURRENT> 1,751
<APPREC-INCREASE-CURRENT> 876
<NET-CHANGE-FROM-OPS> 2,782
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 15
<DISTRIBUTIONS-OF-GAINS> 130
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,732
<NUMBER-OF-SHARES-REDEEMED> 364
<SHARES-REINVESTED> 133
<NET-CHANGE-IN-ASSETS> 7,311
<ACCUMULATED-NII-PRIOR> 15
<ACCUMULATED-GAINS-PRIOR> 74
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 134
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 405
<AVERAGE-NET-ASSETS> 1,717
<PER-SHARE-NAV-BEGIN> 13.56
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 2.52
<PER-SHARE-DIVIDEND> 0.12
<PER-SHARE-DISTRIBUTIONS> 1.87
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.33
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND BALANCED PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 093
<NAME> BALANCED PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,762
<INVESTMENTS-AT-VALUE> 17,291
<RECEIVABLES> 843
<ASSETS-OTHER> 42
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 18,176
<PAYABLE-FOR-SECURITIES> 503
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 115
<TOTAL-LIABILITIES> 618
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 14,316
<SHARES-COMMON-STOCK> 109
<SHARES-COMMON-PRIOR> 71
<ACCUMULATED-NII-CURRENT> 23
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,715
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,504
<NET-ASSETS> 17,558
<DIVIDEND-INCOME> 126
<INTEREST-INCOME> 295
<OTHER-INCOME> 0
<EXPENSES-NET> 266
<NET-INVESTMENT-INCOME> 155
<REALIZED-GAINS-CURRENT> 1,751
<APPREC-INCREASE-CURRENT> 876
<NET-CHANGE-FROM-OPS> 2,782
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 12
<DISTRIBUTIONS-OF-GAINS> 128
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 813
<NUMBER-OF-SHARES-REDEEMED> 437
<SHARES-REINVESTED> 119
<NET-CHANGE-IN-ASSETS> 7,311
<ACCUMULATED-NII-PRIOR> 15
<ACCUMULATED-GAINS-PRIOR> 74
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 134
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 405
<AVERAGE-NET-ASSETS> 1,195
<PER-SHARE-NAV-BEGIN> 13.57
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 2.52
<PER-SHARE-DIVIDEND> 0.13
<PER-SHARE-DISTRIBUTIONS> 1.88
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.33
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND FLEXIBLE INCOME
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 051
<NAME> FLEXIBLE INCOME PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,977
<INVESTMENTS-AT-VALUE> 16,782
<RECEIVABLES> 530
<ASSETS-OTHER> 10
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 17,322
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 116
<TOTAL-LIABILITIES> 116
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 17,036
<SHARES-COMMON-STOCK> 1,593
<SHARES-COMMON-PRIOR> 1,823
<ACCUMULATED-NII-CURRENT> 54
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (689)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 805
<NET-ASSETS> 17,206
<DIVIDEND-INCOME> 13
<INTEREST-INCOME> 1,419
<OTHER-INCOME> 0
<EXPENSES-NET> 330
<NET-INVESTMENT-INCOME> 1,102
<REALIZED-GAINS-CURRENT> 328
<APPREC-INCREASE-CURRENT> 439
<NET-CHANGE-FROM-OPS> 1,869
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1,022
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,032
<NUMBER-OF-SHARES-REDEEMED> 3,984
<SHARES-REINVESTED> 791
<NET-CHANGE-IN-ASSETS> (1,163)
<ACCUMULATED-NII-PRIOR> 95
<ACCUMULATED-GAINS-PRIOR> 48
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 156
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 425
<AVERAGE-NET-ASSETS> 15,862
<PER-SHARE-NAV-BEGIN> 9.33
<PER-SHARE-NII> 0.61
<PER-SHARE-GAIN-APPREC> 0.42
<PER-SHARE-DIVIDEND> 0.61
<PER-SHARE-DISTRIBUTIONS> 0.61
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.75
<EXPENSE-RATIO> 1.85
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND FLEXIBLE INCOME
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 052
<NAME> FLEXIBLE INCOME PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,977
<INVESTMENTS-AT-VALUE> 16,782
<RECEIVABLES> 530
<ASSETS-OTHER> 10
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 17,322
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 116
<TOTAL-LIABILITIES> 116
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 17,036
<SHARES-COMMON-STOCK> 77
<SHARES-COMMON-PRIOR> 56
<ACCUMULATED-NII-CURRENT> 54
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (689)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 805
<NET-ASSETS> 17,206
<DIVIDEND-INCOME> 13
<INTEREST-INCOME> 1,419
<OTHER-INCOME> 0
<EXPENSES-NET> 330
<NET-INVESTMENT-INCOME> 1,102
<REALIZED-GAINS-CURRENT> 328
<APPREC-INCREASE-CURRENT> 439
<NET-CHANGE-FROM-OPS> 1,869
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 37
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 285
<NUMBER-OF-SHARES-REDEEMED> 121
<SHARES-REINVESTED> 30
<NET-CHANGE-IN-ASSETS> (1,163)
<ACCUMULATED-NII-PRIOR> 95
<ACCUMULATED-GAINS-PRIOR> 48
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 156
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 425
<AVERAGE-NET-ASSETS> 637
<PER-SHARE-NAV-BEGIN> 9.32
<PER-SHARE-NII> 0.56
<PER-SHARE-GAIN-APPREC> 0.42
<PER-SHARE-DIVIDEND> 0.55
<PER-SHARE-DISTRIBUTIONS> 0.55
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.75
<EXPENSE-RATIO> 2.50
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND FLEXIBLE INCOME
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 053
<NAME> FLEXIBLE INCOME PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,977
<INVESTMENTS-AT-VALUE> 16,782
<RECEIVABLES> 530
<ASSETS-OTHER> 10
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 17,322
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 116
<TOTAL-LIABILITIES> 116
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 17,036
<SHARES-COMMON-STOCK> 95
<SHARES-COMMON-PRIOR> 91
<ACCUMULATED-NII-CURRENT> 54
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (689)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 805
<NET-ASSETS> 17,206
<DIVIDEND-INCOME> 13
<INTEREST-INCOME> 1,419
<OTHER-INCOME> 0
<EXPENSES-NET> 330
<NET-INVESTMENT-INCOME> 1,102
<REALIZED-GAINS-CURRENT> 328
<APPREC-INCREASE-CURRENT> 439
<NET-CHANGE-FROM-OPS> 1,869
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 49
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 507
<NUMBER-OF-SHARES-REDEEMED> 509
<SHARES-REINVESTED> 45
<NET-CHANGE-IN-ASSETS> (1,163)
<ACCUMULATED-NII-PRIOR> 95
<ACCUMULATED-GAINS-PRIOR> 48
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 156
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 425
<AVERAGE-NET-ASSETS> 830
<PER-SHARE-NAV-BEGIN> 9.32
<PER-SHARE-NII> 0.57
<PER-SHARE-GAIN-APPREC> 0.42
<PER-SHARE-DIVIDEND> 0.56
<PER-SHARE-DISTRIBUTIONS> 0.56
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.75
<EXPENSE-RATIO> 2.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND INCOME PLUS
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 031
<NAME> INCOME PLUS PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 66,095
<INVESTMENTS-AT-VALUE> 69,486
<RECEIVABLES> 1,428
<ASSETS-OTHER> 80
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 70,994
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 141
<TOTAL-LIABILITIES> 141
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 65,719
<SHARES-COMMON-STOCK> 5,986
<SHARES-COMMON-PRIOR> 6,247
<ACCUMULATED-NII-CURRENT> 308
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,434
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,392
<NET-ASSETS> 70,853
<DIVIDEND-INCOME> 355
<INTEREST-INCOME> 5,502
<OTHER-INCOME> 0
<EXPENSES-NET> 919
<NET-INVESTMENT-INCOME> 4,938
<REALIZED-GAINS-CURRENT> 1,592
<APPREC-INCREASE-CURRENT> 1,205
<NET-CHANGE-FROM-OPS> 7,735
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 4,601
<DISTRIBUTIONS-OF-GAINS> 598
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,959
<NUMBER-OF-SHARES-REDEEMED> 12,535
<SHARES-REINVESTED> 3,818
<NET-CHANGE-IN-ASSETS> 983
<ACCUMULATED-NII-PRIOR> 327
<ACCUMULATED-GAINS-PRIOR> 227
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 417
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 919
<AVERAGE-NET-ASSETS> 65,274
<PER-SHARE-NAV-BEGIN> 10.61
<PER-SHARE-NII> 0.76
<PER-SHARE-GAIN-APPREC> 0.44
<PER-SHARE-DIVIDEND> 0.75
<PER-SHARE-DISTRIBUTIONS> 0.85
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.96
<EXPENSE-RATIO> 1.27
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND INCOME PLUS
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 032
<NAME> INCOME PLUS PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 66,095
<INVESTMENTS-AT-VALUE> 69,486
<RECEIVABLES> 1,428
<ASSETS-OTHER> 80
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 70,994
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 141
<TOTAL-LIABILITIES> 141
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 65,719
<SHARES-COMMON-STOCK> 161
<SHARES-COMMON-PRIOR> 76
<ACCUMULATED-NII-CURRENT> 308
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,434
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,392
<NET-ASSETS> 70,853
<DIVIDEND-INCOME> 355
<INTEREST-INCOME> 5,502
<OTHER-INCOME> 0
<EXPENSES-NET> 919
<NET-INVESTMENT-INCOME> 4,938
<REALIZED-GAINS-CURRENT> 1,592
<APPREC-INCREASE-CURRENT> 1,205
<NET-CHANGE-FROM-OPS> 7,735
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 80
<DISTRIBUTIONS-OF-GAINS> 8
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,147
<NUMBER-OF-SHARES-REDEEMED> 306
<SHARES-REINVESTED> 64
<NET-CHANGE-IN-ASSETS> 983
<ACCUMULATED-NII-PRIOR> 327
<ACCUMULATED-GAINS-PRIOR> 227
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 417
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 919
<AVERAGE-NET-ASSETS> 1,271
<PER-SHARE-NAV-BEGIN> 10.61
<PER-SHARE-NII> 0.69
<PER-SHARE-GAIN-APPREC> 0.44
<PER-SHARE-DIVIDEND> 0.68
<PER-SHARE-DISTRIBUTIONS> 0.78
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.96
<EXPENSE-RATIO> 1.92
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND INCOME PLUS
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 033
<NAME> INCOME PLUS PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 66,095
<INVESTMENTS-AT-VALUE> 69,486
<RECEIVABLES> 1,428
<ASSETS-OTHER> 80
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 70,994
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 141
<TOTAL-LIABILITIES> 141
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 65,719
<SHARES-COMMON-STOCK> 318
<SHARES-COMMON-PRIOR> 262
<ACCUMULATED-NII-CURRENT> 308
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,434
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,392
<NET-ASSETS> 70,853
<DIVIDEND-INCOME> 355
<INTEREST-INCOME> 5,502
<OTHER-INCOME> 0
<EXPENSES-NET> 919
<NET-INVESTMENT-INCOME> 4,938
<REALIZED-GAINS-CURRENT> 1,592
<APPREC-INCREASE-CURRENT> 1,205
<NET-CHANGE-FROM-OPS> 7,735
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 191
<DISTRIBUTIONS-OF-GAINS> 26
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,033
<NUMBER-OF-SHARES-REDEEMED> 2,617
<SHARES-REINVESTED> 189
<NET-CHANGE-IN-ASSETS> 983
<ACCUMULATED-NII-PRIOR> 327
<ACCUMULATED-GAINS-PRIOR> 227
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 417
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 919
<AVERAGE-NET-ASSETS> 2,945
<PER-SHARE-NAV-BEGIN> 10.61
<PER-SHARE-NII> 0.70
<PER-SHARE-GAIN-APPREC> 0.44
<PER-SHARE-DIVIDEND> 0.69
<PER-SHARE-DISTRIBUTIONS> 0.79
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.96
<EXPENSE-RATIO> 1.82
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND TAX-EXEMPT
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 021
<NAME> TAX-EXEMPT PORTFOLIO/CLASS A
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLAR
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 23,372
<INVESTMENTS-AT-VALUE> 24,308
<RECEIVABLES> 350
<ASSETS-OTHER> 77
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 24,735
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 117
<TOTAL-LIABILITIES> 117
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 23,359
<SHARES-COMMON-STOCK> 1,985
<SHARES-COMMON-PRIOR> 2,144
<ACCUMULATED-NII-CURRENT> 40
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 283
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 936
<NET-ASSETS> 24,618
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,380
<OTHER-INCOME> 0
<EXPENSES-NET> 250
<NET-INVESTMENT-INCOME> 1,130
<REALIZED-GAINS-CURRENT> 286
<APPREC-INCREASE-CURRENT> 619
<NET-CHANGE-FROM-OPS> 2,035
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1,091
<DISTRIBUTIONS-OF-GAINS> 167
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 984
<NUMBER-OF-SHARES-REDEEMED> 3,643
<SHARES-REINVESTED> 843
<NET-CHANGE-IN-ASSETS> (958)
<ACCUMULATED-NII-PRIOR> 100
<ACCUMULATED-GAINS-PRIOR> (1)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 148
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 405
<AVERAGE-NET-ASSETS> 23,627
<PER-SHARE-NAV-BEGIN> 11.40
<PER-SHARE-NII> 0.53
<PER-SHARE-GAIN-APPREC> 0.43
<PER-SHARE-DIVIDEND> 0.53
<PER-SHARE-DISTRIBUTIONS> 0.61
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.75
<EXPENSE-RATIO> 1.00
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND TAX-EXEMPT
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 022
<NAME> TAX-EXEMPT PORTFOLIO/CLASS B
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLAR
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 23,372
<INVESTMENTS-AT-VALUE> 24,308
<RECEIVABLES> 350
<ASSETS-OTHER> 77
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 24,735
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 117
<TOTAL-LIABILITIES> 117
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 23,359
<SHARES-COMMON-STOCK> 32
<SHARES-COMMON-PRIOR> 18
<ACCUMULATED-NII-CURRENT> 40
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 283
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 936
<NET-ASSETS> 24,618
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,380
<OTHER-INCOME> 0
<EXPENSES-NET> 250
<NET-INVESTMENT-INCOME> 1,130
<REALIZED-GAINS-CURRENT> 286
<APPREC-INCREASE-CURRENT> 619
<NET-CHANGE-FROM-OPS> 2,035
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 11
<DISTRIBUTIONS-OF-GAINS> 2
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 167
<NUMBER-OF-SHARES-REDEEMED> 5
<SHARES-REINVESTED> 7
<NET-CHANGE-IN-ASSETS> (958)
<ACCUMULATED-NII-PRIOR> 100
<ACCUMULATED-GAINS-PRIOR> (1)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 148
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 405
<AVERAGE-NET-ASSETS> 272
<PER-SHARE-NAV-BEGIN> 11.40
<PER-SHARE-NII> 0.44
<PER-SHARE-GAIN-APPREC> 0.43
<PER-SHARE-DIVIDEND> 0.45
<PER-SHARE-DISTRIBUTIONS> 0.53
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.74
<EXPENSE-RATIO> 1.65
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY INFORMATION EXTRACTED FROM
THE FINANCIAL STATEMENTS OF IDEX SERIES FUND TAX-EXEMPT
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1997, AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000787623
<NAME> IDEX SERIES FUND
<SERIES>
<NUMBER> 023
<NAME> TAX-EXEMPT PORTFOLIO/CLASS C
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLAR
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> OCT-31-1997
<PERIOD-END> OCT-31-1997
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 23,372
<INVESTMENTS-AT-VALUE> 24,308
<RECEIVABLES> 350
<ASSETS-OTHER> 77
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 24,735
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 117
<TOTAL-LIABILITIES> 117
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 23,359
<SHARES-COMMON-STOCK> 78
<SHARES-COMMON-PRIOR> 82
<ACCUMULATED-NII-CURRENT> 40
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 283
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 936
<NET-ASSETS> 24,618
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,380
<OTHER-INCOME> 0
<EXPENSES-NET> 250
<NET-INVESTMENT-INCOME> 1,130
<REALIZED-GAINS-CURRENT> 286
<APPREC-INCREASE-CURRENT> 619
<NET-CHANGE-FROM-OPS> 2,035
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 32
<DISTRIBUTIONS-OF-GAINS> 5
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 522
<NUMBER-OF-SHARES-REDEEMED> 591
<SHARES-REINVESTED> 31
<NET-CHANGE-IN-ASSETS> (958)
<ACCUMULATED-NII-PRIOR> 100
<ACCUMULATED-GAINS-PRIOR> (1)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 148
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 405
<AVERAGE-NET-ASSETS> 737
<PER-SHARE-NAV-BEGIN> 11.40
<PER-SHARE-NII> 0.50
<PER-SHARE-GAIN-APPREC> 0.43
<PER-SHARE-DIVIDEND> 0.50
<PER-SHARE-DISTRIBUTIONS> 0.58
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.75
<EXPENSE-RATIO> 1.25
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<PAGE>
</TABLE>
December 8, 1997
To the Board of Trustees of
IDEX Series Fund
In planning and performing our audit of the financial statements
of the IDEX Series Fund (the "Fund") for the year ended October
31, 1997, we considered its internal control, including control
activities for safeguarding securities, in order to determine our
auditing procedures for the purposes of expressing our opinion on
the financial statements and to comply with the requirements of
Form N-SAR, not to provide assurance on internal control.
The management of the Fund is responsible for establishing and
maintaining internal control. In fulfilling this responsibility,
estimates and judgements by management are required to access the
expected benefits and related costs of control activities.
Generally, control activities that are relevant to an audit
pertain to the entity's objective of preparing financial
statements for external purposes that are fairly presented in
conformity with generally accepted accounting principles. Those
control activities include the safeguarding of assets against
unauthorized acquisition, use or disposition.
Because of inherent limitations in internal control, errors or
irregularities may occur and not be detected. Also, projections
of any evaluations of internal control to future periods is
subject to the risk that it may become inadequate because of
changes in conditions or that the effectiveness of the design and
operation may deteriorate.
Our considerations of internal control would not necessarily
disclose all matters in internal control that might be material
weakness under standards established by the American Institute of
Certified Public Accountants. A material weakness is a condition
in which the design or operation of any specific internal control
component does not reduce to a relatively low level the risk that
errors or irregularities in amounts that would be material in
relation to the financial statements being audited may occur and
not be detected within a timely period by employees in the normal
course of performing their assigned functions. However, we noted
no matters involving internal control activities for safeguarding
securities, that we consider to be material weaknesses as defined
above as of October 31, 1997.
This report is intended solely for the information and use of
management and the trustees of the Fund and the Securities and
Exchange Commission.
Price Waterhouse LLP
