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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 9
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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<PAGE> PAGE 21
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<PAGE> PAGE 22
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<PAGE> PAGE 23
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<PAGE> PAGE 24
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<PAGE> PAGE 25
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<PAGE> PAGE 26
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<PAGE> PAGE 27
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<PAGE> PAGE 28
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<PAGE> PAGE 29
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<PAGE> PAGE 30
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<PAGE> PAGE 31
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<PAGE> PAGE 32
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<PAGE> PAGE 33
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<PAGE> PAGE 34
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<PAGE> PAGE 35
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<PAGE> PAGE 36
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<PAGE> PAGE 37
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<PAGE> PAGE 38
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<PAGE> PAGE 39
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<PAGE> PAGE 40
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<PAGE> PAGE 41
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<PAGE> PAGE 42
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<PAGE> PAGE 43
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<PAGE> PAGE 44
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<PAGE> PAGE 45
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<PAGE> PAGE 46
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<PAGE> PAGE 47
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<PAGE> PAGE 48
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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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<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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<PAGE> PAGE 57
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<PAGE> PAGE 58
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<PAGE> PAGE 59
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<PAGE> PAGE 60
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<PAGE> PAGE 61
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042 G001200 0
042 H001200 30
043 001200 27
044 001200 0
045 001200 Y
046 001200 N
047 001200 Y
048 001200 0.000
048 A011200 750000
048 A021200 1.000
048 B011200 250000
048 B021200 0.900
048 C011200 0
048 C021200 0.000
048 D011200 0
048 D021200 0.000
048 E011200 0
048 E021200 0.000
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<PAGE> PAGE 62
048 F021200 0.000
048 G011200 0
048 G021200 0.000
048 H011200 0
048 H021200 0.000
048 I011200 0
048 I021200 0.000
048 J011200 0
048 J021200 0.000
048 K011200 1000000
048 K021200 0.850
049 001200 N
050 001200 N
051 001200 N
052 001200 N
053 A001200 Y
053 B001200 Y
053 C001200 N
055 A001200 N
055 B001200 N
056 001200 N
057 001200 N
058 A001200 N
059 001200 Y
060 A001200 Y
060 B001200 Y
061 001200 500
062 A001200 N
062 B001200 0.0
062 C001200 0.0
062 D001200 0.0
062 E001200 0.0
062 F001200 0.0
062 G001200 0.0
062 H001200 0.0
062 I001200 0.0
062 J001200 0.0
062 K001200 0.0
062 L001200 0.0
062 M001200 0.0
062 N001200 0.0
062 O001200 0.0
062 P001200 0.0
062 Q001200 0.0
062 R001200 0.0
066 A001200 Y
066 B001200 N
066 C001200 N
066 D001200 Y
066 E001200 N
066 F001200 N
<PAGE> PAGE 63
066 G001200 N
067 001200 N
068 A001200 N
068 B001200 Y
069 001200 N
070 A011200 Y
070 A021200 Y
070 B011200 Y
070 B021200 N
070 C011200 Y
070 C021200 N
070 D011200 Y
070 D021200 N
070 E011200 Y
070 E021200 N
070 F011200 Y
070 F021200 N
070 G011200 Y
070 G021200 N
070 H011200 Y
070 H021200 N
070 I011200 N
070 I021200 N
070 J011200 Y
070 J021200 Y
070 K011200 Y
070 K021200 N
070 L011200 Y
070 L021200 Y
070 M011200 Y
070 M021200 Y
070 N011200 Y
070 N021200 N
070 O011200 Y
070 O021200 N
070 P011200 N
070 P021200 N
070 Q011200 N
070 Q021200 N
070 R011200 N
070 R021200 N
071 A001200 5021
071 B001200 2522
071 C001200 5035
071 D001200 50
072 A001200 12
072 B001200 12
072 C001200 86
072 D001200 0
072 E001200 0
072 F001200 27
<PAGE> PAGE 64
072 G001200 26
072 H001200 0
072 I001200 25
072 J001200 67
072 K001200 0
072 L001200 0
072 M001200 1
072 N001200 53
072 O001200 0
072 P001200 0
072 Q001200 0
072 R001200 6
072 S001200 0
072 T001200 27
072 U001200 0
072 V001200 0
072 W001200 3
072 X001200 235
072 Y001200 118
072 Z001200 -19
072AA001200 0
072BB001200 286
072CC011200 335
072CC021200 0
072DD011200 20
072DD021200 2
072EE001200 0
073 A011200 0.0675
073 A021200 0.0286
073 B001200 0.0000
073 C001200 0.0000
074 A001200 69
074 B001200 202
074 C001200 0
074 D001200 0
074 E001200 201
074 F001200 6095
074 G001200 0
074 H001200 0
074 I001200 0
074 J001200 1
074 K001200 4
074 L001200 32
074 M001200 1
074 N001200 6605
074 O001200 0
074 P001200 3
074 Q001200 0
074 R011200 0
074 R021200 0
074 R031200 0
<PAGE> PAGE 65
074 R041200 26
074 S001200 0
074 T001200 6576
074 U011200 462
074 U021200 149
074 V011200 0.00
074 V021200 0.00
074 W001200 0.0000
074 X001200 896
074 Y001200 0
075 A001200 0
075 B001200 5365
076 001200 0.00
024 001300 Y
025 A001301 BEAR STEARNS COMPANIES, INC.
025 B001301 13-3793124
025 C001301 E
025 D001301 132
025 D001302 0
025 D001303 0
025 D001304 0
025 D001305 0
025 D001306 0
025 D001307 0
025 D001308 0
028 A011300 1242
028 A021300 0
028 A031300 0
028 A041300 209
028 B011300 846
028 B021300 0
028 B031300 0
028 B041300 463
028 C011300 814
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028 C041300 835
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028 E021300 0
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028 G011300 4490
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<PAGE> PAGE 66
028 G031300 0
028 G041300 2694
028 H001300 3776
029 001300 Y
030 A001300 173
030 B001300 5.50
030 C001300 0.00
031 A001300 25
031 B001300 0
032 001300 53
033 001300 94
034 001300 Y
035 001300 6
036 A001300 Y
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038 001300 0
039 001300 Y
040 001300 Y
041 001300 Y
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042 E001300 0
042 F001300 0
042 G001300 0
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043 001300 88
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047 001300 Y
048 001300 0.000
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048 D021300 0.000
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048 E021300 0.000
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048 F021300 0.000
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<PAGE> PAGE 67
048 I021300 0.000
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050 001300 N
051 001300 N
052 001300 N
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055 A001300 Y
055 B001300 N
056 001300 N
057 001300 N
058 A001300 N
059 001300 Y
060 A001300 Y
060 B001300 Y
061 001300 500
062 A001300 N
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<PAGE> PAGE 68
070 A021300 N
070 B011300 Y
070 B021300 N
070 C011300 Y
070 C021300 N
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070 D021300 N
070 E011300 Y
070 E021300 N
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070 G011300 Y
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070 H011300 Y
070 H021300 N
070 I011300 N
070 I021300 N
070 J011300 Y
070 J021300 N
070 K011300 Y
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070 L021300 Y
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070 M021300 Y
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070 N021300 Y
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070 O021300 N
070 P011300 N
070 P021300 N
070 Q011300 N
070 Q021300 N
070 R011300 N
070 R021300 N
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071 B001300 3623
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<PAGE> PAGE 69
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<PAGE> PAGE 70
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SIGNATURE CHRISTOPHER G. ROETZER
TITLE V.P & ASST TREASURER
December 15, 1998
To the Shareholders and
Board of Trustees of
IDEX Series Fund
In planning and performing our audit of the financial statements
of IDEX Series Fund (the "Fund") for the year ended October 31,
1998, we considered its internal control, including control
activities for safeguarding securities, in order to determine our
auditing procedures for the purpose 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 judgments by management are required to assess the
expected benefits and related costs of controls. Generally,
controls 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 controls include the safeguarding
of assets against unauthorized acquisition, use or disposition.
Because of inherent limitations in internal control, errors or
fraud may occur and not be detected. Also, projection of any
evaluation 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 consideration of internal control would not necessarily
disclose all matters in internal control that might be material
weaknesses under standards established by the American Institute
of Certified Public Accountants. A material weakness is a
condition in which the design or operation of one or more of the
internal control components does not reduce to a relatively low
level the risk that misstatements caused by error or fraud 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 and its operation, including controls for
safeguarding securities, that we consider to be material
weaknesses as defined above as of October 31, 1998.
This report is intended solely for the information and use of
management and the Board of Trustees of the Fund and the
Securities and Exchange Commission.
PricewaterhouseCoopers LLP
Kansas City, Missouri
December 15, 1998
IDEX SERIES FUND
TO THE SHAREHOLDERS OF
CAPITAL APPRECIATION, GLOBAL, GROWTH, BALANCED AND FLEXIBLE INCOME
PORTFOLIOS
Section 270.30d-1 under the Investment Company Act of 1940, as
amended, titled "Reports to Stockholders of Management Companies,"
requires regulated investment companies to report on all subject
matters put to the vote of shareholders and provide final results.
Accordingly, Idex Management solicited a vote by the shareholders
for:
Proposal 1: Approval of a new Management and Investment
Advisory Agreement between IDEX Series Fund and Idex Management,
Inc., with respect to the Capital Appreciation, Global, Growth,
Balanced and Flexible Income Portfolios.
Proposal 2: Approval of a new Investment Counsel Agreement
between Idex Management, Inc. and Janus Capital Corporation, with
respect to the Capital Appreciation, Global, Growth, Balanced and
Flexible Income Portfolios.
At a special meeting of shareholders held on June 10, 1998, the
results of the proposals were as follows:
Proposal 1
PORTFOLIO FOR AGAINST ABSTAIN
Capital Appreciation 95% 1% 4%
Global 96% 1% 3%
Growth 92% 2% 6%
Balanced 95% 2% 3%
Flexible Income 93% 1% 6%
Proposal 2
PORTFOLIO FOR AGAINST ABSTAIN
Capital Appreciation 95% 1% 4%
Global 96% 1% 3%
Growth 92% 2% 6%
Balanced 95% 2% 3%
Flexible Income 92% 1% 7%
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 47,525
<INVESTMENTS-AT-VALUE> 61,292
<RECEIVABLES> 1,739
<ASSETS-OTHER> 16
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 63,047
<PAYABLE-FOR-SECURITIES> 304
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 193
<TOTAL-LIABILITIES> 497
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 45,563
<SHARES-COMMON-STOCK> 2,087
<SHARES-COMMON-PRIOR> 1,666
<ACCUMULATED-NII-CURRENT> (5)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,224
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 13,768
<NET-ASSETS> 62,550
<DIVIDEND-INCOME> 257
<INTEREST-INCOME> 123
<OTHER-INCOME> 0
<EXPENSES-NET> 1,030
<NET-INVESTMENT-INCOME> (650)
<REALIZED-GAINS-CURRENT> 3,253
<APPREC-INCREASE-CURRENT> 7,048
<NET-CHANGE-FROM-OPS> 9,651
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 1,015
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 37,151
<NUMBER-OF-SHARES-REDEEMED> 1,418
<SHARES-REINVESTED> 1,001
<NET-CHANGE-IN-ASSETS> 54,246
<ACCUMULATED-NII-PRIOR> (382)
<ACCUMULATED-GAINS-PRIOR> 3,842
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 517
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,203
<AVERAGE-NET-ASSETS> 39,850
<PER-SHARE-NAV-BEGIN> 18.77
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 4.02
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.58
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 22.24
<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 AGGRESSIVE GROWTH
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 47,525
<INVESTMENTS-AT-VALUE> 61,292
<RECEIVABLES> 1,739
<ASSETS-OTHER> 16
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 63,047
<PAYABLE-FOR-SECURITIES> 304
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 193
<TOTAL-LIABILITIES> 497
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 45,563
<SHARES-COMMON-STOCK> 482
<SHARES-COMMON-PRIOR> 263
<ACCUMULATED-NII-CURRENT> (5)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,224
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 13,768
<NET-ASSETS> 62,550
<DIVIDEND-INCOME> 257
<INTEREST-INCOME> 123
<OTHER-INCOME> 0
<EXPENSES-NET> 1,030
<NET-INVESTMENT-INCOME> (650)
<REALIZED-GAINS-CURRENT> 3,253
<APPREC-INCREASE-CURRENT> 7,048
<NET-CHANGE-FROM-OPS> 9,651
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 163
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,508
<NUMBER-OF-SHARES-REDEEMED> 54
<SHARES-REINVESTED> 161
<NET-CHANGE-IN-ASSETS> 54,246
<ACCUMULATED-NII-PRIOR> (382)
<ACCUMULATED-GAINS-PRIOR> 3,842
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 517
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,203
<AVERAGE-NET-ASSETS> 7,335
<PER-SHARE-NAV-BEGIN> 18.58
<PER-SHARE-NII> (0.09)
<PER-SHARE-GAIN-APPREC> 4.02
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.58
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 21.93
<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 AGGRESSIVE GROWTH
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 47,525
<INVESTMENTS-AT-VALUE> 61,292
<RECEIVABLES> 1,739
<ASSETS-OTHER> 16
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 63,047
<PAYABLE-FOR-SECURITIES> 304
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 193
<TOTAL-LIABILITIES> 497
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 45,563
<SHARES-COMMON-STOCK> 254
<SHARES-COMMON-PRIOR> 186
<ACCUMULATED-NII-CURRENT> (5)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 3,224
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 13,768
<NET-ASSETS> 62,550
<DIVIDEND-INCOME> 257
<INTEREST-INCOME> 123
<OTHER-INCOME> 0
<EXPENSES-NET> 1,030
<NET-INVESTMENT-INCOME> (650)
<REALIZED-GAINS-CURRENT> 3,253
<APPREC-INCREASE-CURRENT> 7,048
<NET-CHANGE-FROM-OPS> 9,651
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 110
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,531
<NUMBER-OF-SHARES-REDEEMED> 107
<SHARES-REINVESTED> 110
<NET-CHANGE-IN-ASSETS> 54,246
<ACCUMULATED-NII-PRIOR> (382)
<ACCUMULATED-GAINS-PRIOR> 3,842
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 517
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,203
<AVERAGE-NET-ASSETS> 4,624
<PER-SHARE-NAV-BEGIN> 18.61
<PER-SHARE-NII> (0.07)
<PER-SHARE-GAIN-APPREC> 4.02
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.58
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 21.98
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 6,230
<INVESTMENTS-AT-VALUE> 6,497
<RECEIVABLES> 37
<ASSETS-OTHER> 70
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 6,604
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 28
<TOTAL-LIABILITIES> 28
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 6,625
<SHARES-COMMON-STOCK> 462
<SHARES-COMMON-PRIOR> 291
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (314)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 265
<NET-ASSETS> 6,576
<DIVIDEND-INCOME> 86
<INTEREST-INCOME> 12
<OTHER-INCOME> 0
<EXPENSES-NET> 117
<NET-INVESTMENT-INCOME> (19)
<REALIZED-GAINS-CURRENT> (286)
<APPREC-INCREASE-CURRENT> 335
<NET-CHANGE-FROM-OPS> 30
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 20
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,411
<NUMBER-OF-SHARES-REDEEMED> 552
<SHARES-REINVESTED> 20
<NET-CHANGE-IN-ASSETS> 2,512
<ACCUMULATED-NII-PRIOR> 1
<ACCUMULATED-GAINS-PRIOR> (11)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 53
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 235
<AVERAGE-NET-ASSETS> 4,001
<PER-SHARE-NAV-BEGIN> 10.57
<PER-SHARE-NII> 0.07
<PER-SHARE-GAIN-APPREC> 0.20
<PER-SHARE-DIVIDEND> 0.07
<PER-SHARE-DISTRIBUTIONS> 0.07
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.77
<EXPENSE-RATIO> 2.03
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 6,230
<INVESTMENTS-AT-VALUE> 6,497
<RECEIVABLES> 37
<ASSETS-OTHER> 70
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 6,604
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 28
<TOTAL-LIABILITIES> 28
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 6,625
<SHARES-COMMON-STOCK> 112
<SHARES-COMMON-PRIOR> 56
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (314)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 265
<NET-ASSETS> 6,576
<DIVIDEND-INCOME> 86
<INTEREST-INCOME> 12
<OTHER-INCOME> 0
<EXPENSES-NET> 117
<NET-INVESTMENT-INCOME> (19)
<REALIZED-GAINS-CURRENT> (286)
<APPREC-INCREASE-CURRENT> 335
<NET-CHANGE-FROM-OPS> 30
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 808
<NUMBER-OF-SHARES-REDEEMED> 168
<SHARES-REINVESTED> 1
<NET-CHANGE-IN-ASSETS> 2,512
<ACCUMULATED-NII-PRIOR> 1
<ACCUMULATED-GAINS-PRIOR> (11)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 53
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 235
<AVERAGE-NET-ASSETS> 918
<PER-SHARE-NAV-BEGIN> 10.52
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> 0.20
<PER-SHARE-DIVIDEND> 0.01
<PER-SHARE-DISTRIBUTIONS> 0.01
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.71
<EXPENSE-RATIO> 2.68
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 6,230
<INVESTMENTS-AT-VALUE> 6,497
<RECEIVABLES> 37
<ASSETS-OTHER> 70
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 6,604
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 28
<TOTAL-LIABILITIES> 28
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 6,625
<SHARES-COMMON-STOCK> 37
<SHARES-COMMON-PRIOR> 38
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (314)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 265
<NET-ASSETS> 6,576
<DIVIDEND-INCOME> 86
<INTEREST-INCOME> 12
<OTHER-INCOME> 0
<EXPENSES-NET> 117
<NET-INVESTMENT-INCOME> (19)
<REALIZED-GAINS-CURRENT> (286)
<APPREC-INCREASE-CURRENT> 335
<NET-CHANGE-FROM-OPS> 30
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 1
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 264
<NUMBER-OF-SHARES-REDEEMED> 280
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 2,512
<ACCUMULATED-NII-PRIOR> 1
<ACCUMULATED-GAINS-PRIOR> (11)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 53
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 235
<AVERAGE-NET-ASSETS> 446
<PER-SHARE-NAV-BEGIN> 10.53
<PER-SHARE-NII> 0.01
<PER-SHARE-GAIN-APPREC> 0.20
<PER-SHARE-DIVIDEND> 0.02
<PER-SHARE-DISTRIBUTIONS> 0.02
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.72
<EXPENSE-RATIO> 2.58
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 26,043
<INVESTMENTS-AT-VALUE> 29,608
<RECEIVABLES> 707
<ASSETS-OTHER> 15
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 30,330
<PAYABLE-FOR-SECURITIES> 1,280
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 136
<TOTAL-LIABILITIES> 1,416
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,505
<SHARES-COMMON-STOCK> 1,402
<SHARES-COMMON-PRIOR> 1,296
<ACCUMULATED-NII-CURRENT> (3)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2,846
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,566
<NET-ASSETS> 28,914
<DIVIDEND-INCOME> 82
<INTEREST-INCOME> 51
<OTHER-INCOME> 0
<EXPENSES-NET> 539
<NET-INVESTMENT-INCOME> (406)
<REALIZED-GAINS-CURRENT> 3,248
<APPREC-INCREASE-CURRENT> 50
<NET-CHANGE-FROM-OPS> 2,892
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 589
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 46,957
<NUMBER-OF-SHARES-REDEEMED> 46,239
<SHARES-REINVESTED> 585
<NET-CHANGE-IN-ASSETS> 3,692
<ACCUMULATED-NII-PRIOR> (331)
<ACCUMULATED-GAINS-PRIOR> 778
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 275
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 647
<AVERAGE-NET-ASSETS> 22,682
<PER-SHARE-NAV-BEGIN> 15.90
<PER-SHARE-NII> 0.01
<PER-SHARE-GAIN-APPREC> 1.51
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.45
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.97
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 26,043
<INVESTMENTS-AT-VALUE> 29,608
<RECEIVABLES> 707
<ASSETS-OTHER> 15
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 30,330
<PAYABLE-FOR-SECURITIES> 1,280
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 136
<TOTAL-LIABILITIES> 1,416
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,505
<SHARES-COMMON-STOCK> 223
<SHARES-COMMON-PRIOR> 182
<ACCUMULATED-NII-CURRENT> (3)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2,846
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,566
<NET-ASSETS> 28,914
<DIVIDEND-INCOME> 82
<INTEREST-INCOME> 51
<OTHER-INCOME> 0
<EXPENSES-NET> 539
<NET-INVESTMENT-INCOME> (406)
<REALIZED-GAINS-CURRENT> 3,248
<APPREC-INCREASE-CURRENT> 50
<NET-CHANGE-FROM-OPS> 2,892
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 82
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,331
<NUMBER-OF-SHARES-REDEEMED> 721
<SHARES-REINVESTED> 81
<NET-CHANGE-IN-ASSETS> 3,692
<ACCUMULATED-NII-PRIOR> (331)
<ACCUMULATED-GAINS-PRIOR> 778
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 275
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 647
<AVERAGE-NET-ASSETS> 3,272
<PER-SHARE-NAV-BEGIN> 15.74
<PER-SHARE-NII> (0.08)
<PER-SHARE-GAIN-APPREC> 1.51
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.45
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.72
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 26,043
<INVESTMENTS-AT-VALUE> 29,608
<RECEIVABLES> 707
<ASSETS-OTHER> 15
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 30,330
<PAYABLE-FOR-SECURITIES> 1,280
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 136
<TOTAL-LIABILITIES> 1,416
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,505
<SHARES-COMMON-STOCK> 82
<SHARES-COMMON-PRIOR> 111
<ACCUMULATED-NII-CURRENT> (3)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 2,846
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 3,566
<NET-ASSETS> 28,914
<DIVIDEND-INCOME> 82
<INTEREST-INCOME> 51
<OTHER-INCOME> 0
<EXPENSES-NET> 539
<NET-INVESTMENT-INCOME> (406)
<REALIZED-GAINS-CURRENT> 3,248
<APPREC-INCREASE-CURRENT> 50
<NET-CHANGE-FROM-OPS> 2,892
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 47
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 475
<NUMBER-OF-SHARES-REDEEMED> 997
<SHARES-REINVESTED> 46
<NET-CHANGE-IN-ASSETS> 3,692
<ACCUMULATED-NII-PRIOR> (331)
<ACCUMULATED-GAINS-PRIOR> 778
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 275
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 647
<AVERAGE-NET-ASSETS> 1,559
<PER-SHARE-NAV-BEGIN> 15.77
<PER-SHARE-NII> (0.07)
<PER-SHARE-GAIN-APPREC> 1.51
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.45
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.76
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 425,034
<INVESTMENTS-AT-VALUE> 497,583
<RECEIVABLES> 6,050
<ASSETS-OTHER> 26,438
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 530,071
<PAYABLE-FOR-SECURITIES> 51,490
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 7,949
<TOTAL-LIABILITIES> 59,439
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 405,117
<SHARES-COMMON-STOCK> 12,305
<SHARES-COMMON-PRIOR> 9,212
<ACCUMULATED-NII-CURRENT> (28)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (2,270)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 67,813
<NET-ASSETS> 470,632
<DIVIDEND-INCOME> 3,907
<INTEREST-INCOME> 1,485
<OTHER-INCOME> 0
<EXPENSES-NET> 7,888
<NET-INVESTMENT-INCOME> (2,496)
<REALIZED-GAINS-CURRENT> (2,828)
<APPREC-INCREASE-CURRENT> 32,057
<NET-CHANGE-FROM-OPS> 26,733
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 19,124
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 309,587
<NUMBER-OF-SHARES-REDEEMED> 255,632
<SHARES-REINVESTED> 18,617
<NET-CHANGE-IN-ASSETS> 180,790
<ACCUMULATED-NII-PRIOR> (1,348)
<ACCUMULATED-GAINS-PRIOR> 28,339
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,907
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7,888
<AVERAGE-NET-ASSETS> 269,237
<PER-SHARE-NAV-BEGIN> 23.74
<PER-SHARE-NII> 0.08
<PER-SHARE-GAIN-APPREC> 2.34
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 2.07
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 24.09
<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 GLOBAL PORTFOLIO FOR
THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 425,034
<INVESTMENTS-AT-VALUE> 497,583
<RECEIVABLES> 6,050
<ASSETS-OTHER> 26,438
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 530,071
<PAYABLE-FOR-SECURITIES> 51,490
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 7,949
<TOTAL-LIABILITIES> 59,439
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 405,117
<SHARES-COMMON-STOCK> 4,684
<SHARES-COMMON-PRIOR> 1,880
<ACCUMULATED-NII-CURRENT> (28)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (2,270)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 67,813
<NET-ASSETS> 470,632
<DIVIDEND-INCOME> 3,907
<INTEREST-INCOME> 1,485
<OTHER-INCOME> 0
<EXPENSES-NET> 7,888
<NET-INVESTMENT-INCOME> (2,496)
<REALIZED-GAINS-CURRENT> (2,828)
<APPREC-INCREASE-CURRENT> 32,057
<NET-CHANGE-FROM-OPS> 26,733
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 4,194
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 74,132
<NUMBER-OF-SHARES-REDEEMED> 8,161
<SHARES-REINVESTED> 4,048
<NET-CHANGE-IN-ASSETS> 180,790
<ACCUMULATED-NII-PRIOR> (1,348)
<ACCUMULATED-GAINS-PRIOR> 28,339
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,907
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7,888
<AVERAGE-NET-ASSETS> 74,539
<PER-SHARE-NAV-BEGIN> 23.38
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> 2.34
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 2.07
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 23.62
<EXPENSE-RATIO> 2.47
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 425,034
<INVESTMENTS-AT-VALUE> 497,583
<RECEIVABLES> 6,050
<ASSETS-OTHER> 26,438
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 530,071
<PAYABLE-FOR-SECURITIES> 51,490
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 7,949
<TOTAL-LIABILITIES> 59,439
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 405,117
<SHARES-COMMON-STOCK> 2,698
<SHARES-COMMON-PRIOR> 1,168
<ACCUMULATED-NII-CURRENT> (28)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (2,270)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 67,813
<NET-ASSETS> 470,632
<DIVIDEND-INCOME> 3,907
<INTEREST-INCOME> 1,485
<OTHER-INCOME> 0
<EXPENSES-NET> 7,888
<NET-INVESTMENT-INCOME> (2,496)
<REALIZED-GAINS-CURRENT> (2,828)
<APPREC-INCREASE-CURRENT> 32,057
<NET-CHANGE-FROM-OPS> 26,733
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 2,552
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 74,673
<NUMBER-OF-SHARES-REDEEMED> 39,844
<SHARES-REINVESTED> 2,507
<NET-CHANGE-IN-ASSETS> 180,790
<ACCUMULATED-NII-PRIOR> (1,348)
<ACCUMULATED-GAINS-PRIOR> 28,339
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 3,907
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 7,888
<AVERAGE-NET-ASSETS> 47,431
<PER-SHARE-NAV-BEGIN> 23.30
<PER-SHARE-NII> (0.01)
<PER-SHARE-GAIN-APPREC> 2.34
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 2.07
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 23.56
<EXPENSE-RATIO> 2.37
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 901,006
<INVESTMENTS-AT-VALUE> 1,664,073
<RECEIVABLES> 13,903
<ASSETS-OTHER> 271
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,678,247
<PAYABLE-FOR-SECURITIES> 2,820
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,834
<TOTAL-LIABILITIES> 5,654
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 888,038
<SHARES-COMMON-STOCK> 27,864
<SHARES-COMMON-PRIOR> 24,541
<ACCUMULATED-NII-CURRENT> (143)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 22,261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 762,437
<NET-ASSETS> 1,672,593
<DIVIDEND-INCOME> 10,682
<INTEREST-INCOME> 3,566
<OTHER-INCOME> 0
<EXPENSES-NET> 20,107
<NET-INVESTMENT-INCOME> (5,859)
<REALIZED-GAINS-CURRENT> 21,456
<APPREC-INCREASE-CURRENT> 416,705
<NET-CHANGE-FROM-OPS> 432,302
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 80,490
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 284,285
<NUMBER-OF-SHARES-REDEEMED> 291,088
<SHARES-REINVESTED> 78,048
<NET-CHANGE-IN-ASSETS> 427,579
<ACCUMULATED-NII-PRIOR> 709
<ACCUMULATED-GAINS-PRIOR> 164,142
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 13,582
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 20,107
<AVERAGE-NET-ASSETS> 727,558
<PER-SHARE-NAV-BEGIN> 25.04
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> 7.64
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 3.31
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 29.35
<EXPENSE-RATIO> 1.51
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 901,006
<INVESTMENTS-AT-VALUE> 1,664,073
<RECEIVABLES> 13,903
<ASSETS-OTHER> 271
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,678,247
<PAYABLE-FOR-SECURITIES> 2,820
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,834
<TOTAL-LIABILITIES> 5,654
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 888,038
<SHARES-COMMON-STOCK> 1,426
<SHARES-COMMON-PRIOR> 531
<ACCUMULATED-NII-CURRENT> (143)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 22,261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 762,437
<NET-ASSETS> 1,672,593
<DIVIDEND-INCOME> 10,682
<INTEREST-INCOME> 3,566
<OTHER-INCOME> 0
<EXPENSES-NET> 20,107
<NET-INVESTMENT-INCOME> (5,859)
<REALIZED-GAINS-CURRENT> 21,456
<APPREC-INCREASE-CURRENT> 416,705
<NET-CHANGE-FROM-OPS> 432,302
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 1,902
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 26,000
<NUMBER-OF-SHARES-REDEEMED> 3,944
<SHARES-REINVESTED> 1,872
<NET-CHANGE-IN-ASSETS> 427,579
<ACCUMULATED-NII-PRIOR> 709
<ACCUMULATED-GAINS-PRIOR> 164,142
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 13,582
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 20,107
<AVERAGE-NET-ASSETS> 22,246
<PER-SHARE-NAV-BEGIN> 24.55
<PER-SHARE-NII> (0.25)
<PER-SHARE-GAIN-APPREC> 7.64
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 3.31
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 28.63
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 901,006
<INVESTMENTS-AT-VALUE> 1,664,073
<RECEIVABLES> 13,903
<ASSETS-OTHER> 271
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,678,247
<PAYABLE-FOR-SECURITIES> 2,820
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,834
<TOTAL-LIABILITIES> 5,654
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 888,038
<SHARES-COMMON-STOCK> 2,028
<SHARES-COMMON-PRIOR> 581
<ACCUMULATED-NII-CURRENT> (143)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 22,261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 762,437
<NET-ASSETS> 1,672,593
<DIVIDEND-INCOME> 10,682
<INTEREST-INCOME> 3,566
<OTHER-INCOME> 0
<EXPENSES-NET> 20,107
<NET-INVESTMENT-INCOME> (5,859)
<REALIZED-GAINS-CURRENT> 21,456
<APPREC-INCREASE-CURRENT> 416,705
<NET-CHANGE-FROM-OPS> 432,302
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 1,933
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 223,774
<NUMBER-OF-SHARES-REDEEMED> 188,005
<SHARES-REINVESTED> 1,924
<NET-CHANGE-IN-ASSETS> 427,579
<ACCUMULATED-NII-PRIOR> 709
<ACCUMULATED-GAINS-PRIOR> 164,142
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 13,582
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 20,107
<AVERAGE-NET-ASSETS> 21,678
<PER-SHARE-NAV-BEGIN> 24.62
<PER-SHARE-NII> (0.21)
<PER-SHARE-GAIN-APPREC> 7.64
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 3.31
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 28.74
<EXPENSE-RATIO> 2.06
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 901,006
<INVESTMENTS-AT-VALUE> 1,664,073
<RECEIVABLES> 13,903
<ASSETS-OTHER> 271
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,678,247
<PAYABLE-FOR-SECURITIES> 2,820
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,834
<TOTAL-LIABILITIES> 5,654
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 888,038
<SHARES-COMMON-STOCK> 25,413
<SHARES-COMMON-PRIOR> 23,833
<ACCUMULATED-NII-CURRENT> (143)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 22,261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 762,437
<NET-ASSETS> 1,672,593
<DIVIDEND-INCOME> 10,682
<INTEREST-INCOME> 3,566
<OTHER-INCOME> 0
<EXPENSES-NET> 20,107
<NET-INVESTMENT-INCOME> (5,859)
<REALIZED-GAINS-CURRENT> 21,456
<APPREC-INCREASE-CURRENT> 416,705
<NET-CHANGE-FROM-OPS> 432,302
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 802
<DISTRIBUTIONS-OF-GAINS> 78,155
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 41,003
<NUMBER-OF-SHARES-REDEEMED> 92,807
<SHARES-REINVESTED> 77,497
<NET-CHANGE-IN-ASSETS> 427,579
<ACCUMULATED-NII-PRIOR> 709
<ACCUMULATED-GAINS-PRIOR> 164,142
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 13,582
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 20,107
<AVERAGE-NET-ASSETS> 701,512
<PER-SHARE-NAV-BEGIN> 25.31
<PER-SHARE-NII> 0.13
<PER-SHARE-GAIN-APPREC> 7.64
<PER-SHARE-DIVIDEND> 0.03
<PER-SHARE-DISTRIBUTIONS> 3.34
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 29.74
<EXPENSE-RATIO> 1.16
<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 C.A.S.E. PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 9,016
<INVESTMENTS-AT-VALUE> 7,604
<RECEIVABLES> 178
<ASSETS-OTHER> 11
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7,793
<PAYABLE-FOR-SECURITIES> 127
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 43
<TOTAL-LIABILITIES> 170
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 8,480
<SHARES-COMMON-STOCK> 423
<SHARES-COMMON-PRIOR> 304
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 601
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (1,457)
<NET-ASSETS> 7,623
<DIVIDEND-INCOME> 64
<INTEREST-INCOME> 34
<OTHER-INCOME> 0
<EXPENSES-NET> 188
<NET-INVESTMENT-INCOME> (90)
<REALIZED-GAINS-CURRENT> 820
<APPREC-INCREASE-CURRENT> (2,025)
<NET-CHANGE-FROM-OPS> (1,295)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 340
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,163
<NUMBER-OF-SHARES-REDEEMED> 2,209
<SHARES-REINVESTED> 339
<NET-CHANGE-IN-ASSETS> (761)
<ACCUMULATED-NII-PRIOR> (36)
<ACCUMULATED-GAINS-PRIOR> 774
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 88
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 239
<AVERAGE-NET-ASSETS> 4,475
<PER-SHARE-NAV-BEGIN> 12.90
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> (1.84)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.95
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.14
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 9,016
<INVESTMENTS-AT-VALUE> 7,604
<RECEIVABLES> 178
<ASSETS-OTHER> 11
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7,793
<PAYABLE-FOR-SECURITIES> 127
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 43
<TOTAL-LIABILITIES> 170
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 8,480
<SHARES-COMMON-STOCK> 246
<SHARES-COMMON-PRIOR> 190
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 601
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (1,457)
<NET-ASSETS> 7,623
<DIVIDEND-INCOME> 64
<INTEREST-INCOME> 34
<OTHER-INCOME> 0
<EXPENSES-NET> 188
<NET-INVESTMENT-INCOME> (90)
<REALIZED-GAINS-CURRENT> 820
<APPREC-INCREASE-CURRENT> (2,025)
<NET-CHANGE-FROM-OPS> (1,295)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 191
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,295
<NUMBER-OF-SHARES-REDEEMED> 830
<SHARES-REINVESTED> 191
<NET-CHANGE-IN-ASSETS> (761)
<ACCUMULATED-NII-PRIOR> (36)
<ACCUMULATED-GAINS-PRIOR> 774
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 88
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 239
<AVERAGE-NET-ASSETS> 2,609
<PER-SHARE-NAV-BEGIN> 12.85
<PER-SHARE-NII> (0.04)
<PER-SHARE-GAIN-APPREC> (1.84)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.95
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.02
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 9,016
<INVESTMENTS-AT-VALUE> 7,604
<RECEIVABLES> 178
<ASSETS-OTHER> 11
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 7,793
<PAYABLE-FOR-SECURITIES> 127
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 43
<TOTAL-LIABILITIES> 170
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 8,480
<SHARES-COMMON-STOCK> 88
<SHARES-COMMON-PRIOR> 158
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 601
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (1,457)
<NET-ASSETS> 7,623
<DIVIDEND-INCOME> 64
<INTEREST-INCOME> 34
<OTHER-INCOME> 0
<EXPENSES-NET> 188
<NET-INVESTMENT-INCOME> (90)
<REALIZED-GAINS-CURRENT> 820
<APPREC-INCREASE-CURRENT> (2,025)
<NET-CHANGE-FROM-OPS> (1,295)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 157
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 562
<NUMBER-OF-SHARES-REDEEMED> 1,444
<SHARES-REINVESTED> 155
<NET-CHANGE-IN-ASSETS> (761)
<ACCUMULATED-NII-PRIOR> (36)
<ACCUMULATED-GAINS-PRIOR> 774
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 88
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 239
<AVERAGE-NET-ASSETS> 1,673
<PER-SHARE-NAV-BEGIN> 12.86
<PER-SHARE-NII> (0.03)
<PER-SHARE-GAIN-APPREC> (1.84)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.95
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.04
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,858
<INVESTMENTS-AT-VALUE> 15,032
<RECEIVABLES> 95
<ASSETS-OTHER> 5
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 15,132
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 64
<TOTAL-LIABILITIES> 64
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 15,534
<SHARES-COMMON-STOCK> 724
<SHARES-COMMON-PRIOR> 453
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 360
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (825)
<NET-ASSETS> 15,068
<DIVIDEND-INCOME> 166
<INTEREST-INCOME> 93
<OTHER-INCOME> 0
<EXPENSES-NET> 297
<NET-INVESTMENT-INCOME> (38)
<REALIZED-GAINS-CURRENT> 398
<APPREC-INCREASE-CURRENT> (1,499)
<NET-CHANGE-FROM-OPS> (1,139)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 23
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,802
<NUMBER-OF-SHARES-REDEEMED> 2,500
<SHARES-REINVESTED> 22
<NET-CHANGE-IN-ASSETS> 5,306
<ACCUMULATED-NII-PRIOR> 4
<ACCUMULATED-GAINS-PRIOR> 36
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 140
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 391
<AVERAGE-NET-ASSETS> 7,733
<PER-SHARE-NAV-BEGIN> 11.71
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> (0.61)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.04
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.09
<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 VALUE EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,858
<INVESTMENTS-AT-VALUE> 15,032
<RECEIVABLES> 95
<ASSETS-OTHER> 5
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 15,132
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 64
<TOTAL-LIABILITIES> 64
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 15,534
<SHARES-COMMON-STOCK> 457
<SHARES-COMMON-PRIOR> 244
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 360
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (825)
<NET-ASSETS> 15,068
<DIVIDEND-INCOME> 166
<INTEREST-INCOME> 93
<OTHER-INCOME> 0
<EXPENSES-NET> 297
<NET-INVESTMENT-INCOME> (38)
<REALIZED-GAINS-CURRENT> 398
<APPREC-INCREASE-CURRENT> (1,499)
<NET-CHANGE-FROM-OPS> (1,139)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 11
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 3,143
<NUMBER-OF-SHARES-REDEEMED> 577
<SHARES-REINVESTED> 11
<NET-CHANGE-IN-ASSETS> 5,306
<ACCUMULATED-NII-PRIOR> 4
<ACCUMULATED-GAINS-PRIOR> 36
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 140
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 391
<AVERAGE-NET-ASSETS> 4,105
<PER-SHARE-NAV-BEGIN> 11.67
<PER-SHARE-NII> (0.04)
<PER-SHARE-GAIN-APPREC> (0.61)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.04
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.98
<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 VALUE EQUITY
PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 15,858
<INVESTMENTS-AT-VALUE> 15,032
<RECEIVABLES> 95
<ASSETS-OTHER> 5
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 15,132
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 64
<TOTAL-LIABILITIES> 64
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 15,534
<SHARES-COMMON-STOCK> 183
<SHARES-COMMON-PRIOR> 138
<ACCUMULATED-NII-CURRENT> (1)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 360
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (825)
<NET-ASSETS> 15,068
<DIVIDEND-INCOME> 166
<INTEREST-INCOME> 93
<OTHER-INCOME> 0
<EXPENSES-NET> 297
<NET-INVESTMENT-INCOME> (38)
<REALIZED-GAINS-CURRENT> 398
<APPREC-INCREASE-CURRENT> (1,499)
<NET-CHANGE-FROM-OPS> (1,139)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 7
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,627
<NUMBER-OF-SHARES-REDEEMED> 1,049
<SHARES-REINVESTED> 7
<NET-CHANGE-IN-ASSETS> 5,306
<ACCUMULATED-NII-PRIOR> 4
<ACCUMULATED-GAINS-PRIOR> 36
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 140
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 391
<AVERAGE-NET-ASSETS> 2,173
<PER-SHARE-NAV-BEGIN> 11.67
<PER-SHARE-NII> (0.02)
<PER-SHARE-GAIN-APPREC> (0.61)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0.04
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.00
<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 STRATEGIC TOTAL
RETURN PORTFOLIO FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 43,345
<INVESTMENTS-AT-VALUE> 48,640
<RECEIVABLES> 482
<ASSETS-OTHER> 14
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 49,136
<PAYABLE-FOR-SECURITIES> 137
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 178
<TOTAL-LIABILITIES> 315
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 43,123
<SHARES-COMMON-STOCK> 1,981
<SHARES-COMMON-PRIOR> 1,360
<ACCUMULATED-NII-CURRENT> 141
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5,296
<NET-ASSETS> 48,821
<DIVIDEND-INCOME> 462
<INTEREST-INCOME> 835
<OTHER-INCOME> 0
<EXPENSES-NET> 842
<NET-INVESTMENT-INCOME> 455
<REALIZED-GAINS-CURRENT> 463
<APPREC-INCREASE-CURRENT> 1,265
<NET-CHANGE-FROM-OPS> 2,183
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 340
<DISTRIBUTIONS-OF-GAINS> 961
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 13,885
<NUMBER-OF-SHARES-REDEEMED> 5,093
<SHARES-REINVESTED> 1,287
<NET-CHANGE-IN-ASSETS> 18,162
<ACCUMULATED-NII-PRIOR> 281
<ACCUMULATED-GAINS-PRIOR> 1,228
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 411
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 873
<AVERAGE-NET-ASSETS> 27,644
<PER-SHARE-NAV-BEGIN> 15.91
<PER-SHARE-NII> 0.21
<PER-SHARE-GAIN-APPREC> 0.94
<PER-SHARE-DIVIDEND> 0.21
<PER-SHARE-DISTRIBUTIONS> 0.88
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.18
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 43,345
<INVESTMENTS-AT-VALUE> 48,640
<RECEIVABLES> 482
<ASSETS-OTHER> 14
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 49,136
<PAYABLE-FOR-SECURITIES> 137
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 178
<TOTAL-LIABILITIES> 315
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 43,123
<SHARES-COMMON-STOCK> 606
<SHARES-COMMON-PRIOR> 296
<ACCUMULATED-NII-CURRENT> 141
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5,296
<NET-ASSETS> 48,821
<DIVIDEND-INCOME> 462
<INTEREST-INCOME> 835
<OTHER-INCOME> 0
<EXPENSES-NET> 842
<NET-INVESTMENT-INCOME> 455
<REALIZED-GAINS-CURRENT> 463
<APPREC-INCREASE-CURRENT> 1,265
<NET-CHANGE-FROM-OPS> 2,183
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 42
<DISTRIBUTIONS-OF-GAINS> 225
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,158
<NUMBER-OF-SHARES-REDEEMED> 1,386
<SHARES-REINVESTED> 262
<NET-CHANGE-IN-ASSETS> 18,162
<ACCUMULATED-NII-PRIOR> 281
<ACCUMULATED-GAINS-PRIOR> 1,228
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 411
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 873
<AVERAGE-NET-ASSETS> 7,335
<PER-SHARE-NAV-BEGIN> 15.89
<PER-SHARE-NII> 0.11
<PER-SHARE-GAIN-APPREC> 0.94
<PER-SHARE-DIVIDEND> 0.10
<PER-SHARE-DISTRIBUTIONS> 0.77
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.17
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 43,345
<INVESTMENTS-AT-VALUE> 48,640
<RECEIVABLES> 482
<ASSETS-OTHER> 14
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 49,136
<PAYABLE-FOR-SECURITIES> 137
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 178
<TOTAL-LIABILITIES> 315
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 43,123
<SHARES-COMMON-STOCK> 431
<SHARES-COMMON-PRIOR> 273
<ACCUMULATED-NII-CURRENT> 141
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 261
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5,296
<NET-ASSETS> 48,821
<DIVIDEND-INCOME> 462
<INTEREST-INCOME> 835
<OTHER-INCOME> 0
<EXPENSES-NET> 842
<NET-INVESTMENT-INCOME> 455
<REALIZED-GAINS-CURRENT> 463
<APPREC-INCREASE-CURRENT> 1,265
<NET-CHANGE-FROM-OPS> 2,183
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 42
<DISTRIBUTIONS-OF-GAINS> 199
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,204
<NUMBER-OF-SHARES-REDEEMED> 2,768
<SHARES-REINVESTED> 239
<NET-CHANGE-IN-ASSETS> 18,162
<ACCUMULATED-NII-PRIOR> 281
<ACCUMULATED-GAINS-PRIOR> 1,228
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 411
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 873
<AVERAGE-NET-ASSETS> 6,183
<PER-SHARE-NAV-BEGIN> 15.90
<PER-SHARE-NII> 0.12
<PER-SHARE-GAIN-APPREC> 0.94
<PER-SHARE-DIVIDEND> 0.12
<PER-SHARE-DISTRIBUTIONS> 0.79
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 16.17
<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, 1998,
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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 35,492
<INVESTMENTS-AT-VALUE> 37,622
<RECEIVABLES> 259
<ASSETS-OTHER> 14
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 37,895
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 127
<TOTAL-LIABILITIES> 127
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 33,670
<SHARES-COMMON-STOCK> 1,199
<SHARES-COMMON-PRIOR> 932
<ACCUMULATED-NII-CURRENT> 111
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,857
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,130
<NET-ASSETS> 37,768
<DIVIDEND-INCOME> 346
<INTEREST-INCOME> 878
<OTHER-INCOME> 0
<EXPENSES-NET> 735
<NET-INVESTMENT-INCOME> 489
<REALIZED-GAINS-CURRENT> 1,854
<APPREC-INCREASE-CURRENT> (467)
<NET-CHANGE-FROM-OPS> 1,876
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 229
<DISTRIBUTIONS-OF-GAINS> 688
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,265
<NUMBER-OF-SHARES-REDEEMED> 3,684
<SHARES-REINVESTED> 900
<NET-CHANGE-IN-ASSETS> 10,642
<ACCUMULATED-NII-PRIOR> 275
<ACCUMULATED-GAINS-PRIOR> 1,555
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 333
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 743
<AVERAGE-NET-ASSETS> 14,215
<PER-SHARE-NAV-BEGIN> 13.19
<PER-SHARE-NII> 0.22
<PER-SHARE-GAIN-APPREC> 0.67
<PER-SHARE-DIVIDEND> 0.21
<PER-SHARE-DISTRIBUTIONS> 0.94
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.14
<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, 1998,
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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 35,492
<INVESTMENTS-AT-VALUE> 37,622
<RECEIVABLES> 259
<ASSETS-OTHER> 14
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 37,895
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 127
<TOTAL-LIABILITIES> 127
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 33,670
<SHARES-COMMON-STOCK> 1,118
<SHARES-COMMON-PRIOR> 740
<ACCUMULATED-NII-CURRENT> 111
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,857
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,130
<NET-ASSETS> 37,768
<DIVIDEND-INCOME> 346
<INTEREST-INCOME> 878
<OTHER-INCOME> 0
<EXPENSES-NET> 735
<NET-INVESTMENT-INCOME> 489
<REALIZED-GAINS-CURRENT> 1,854
<APPREC-INCREASE-CURRENT> (467)
<NET-CHANGE-FROM-OPS> 1,876
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 122
<DISTRIBUTIONS-OF-GAINS> 562
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,555
<NUMBER-OF-SHARES-REDEEMED> 3,264
<SHARES-REINVESTED> 679
<NET-CHANGE-IN-ASSETS> 10,642
<ACCUMULATED-NII-PRIOR> 275
<ACCUMULATED-GAINS-PRIOR> 1,555
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 333
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 743
<AVERAGE-NET-ASSETS> 12,497
<PER-SHARE-NAV-BEGIN> 13.18
<PER-SHARE-NII> 0.14
<PER-SHARE-GAIN-APPREC> 0.67
<PER-SHARE-DIVIDEND> 0.13
<PER-SHARE-DISTRIBUTIONS> 0.86
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.13
<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, 1998,
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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 35,492
<INVESTMENTS-AT-VALUE> 37,622
<RECEIVABLES> 259
<ASSETS-OTHER> 14
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 37,895
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 127
<TOTAL-LIABILITIES> 127
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 33,670
<SHARES-COMMON-STOCK> 559
<SHARES-COMMON-PRIOR> 386
<ACCUMULATED-NII-CURRENT> 111
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,857
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2,130
<NET-ASSETS> 37,768
<DIVIDEND-INCOME> 346
<INTEREST-INCOME> 878
<OTHER-INCOME> 0
<EXPENSES-NET> 735
<NET-INVESTMENT-INCOME> 489
<REALIZED-GAINS-CURRENT> 1,854
<APPREC-INCREASE-CURRENT> (467)
<NET-CHANGE-FROM-OPS> 1,876
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 71
<DISTRIBUTIONS-OF-GAINS> 302
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7,236
<NUMBER-OF-SHARES-REDEEMED> 5,319
<SHARES-REINVESTED> 372
<NET-CHANGE-IN-ASSETS> 10,642
<ACCUMULATED-NII-PRIOR> 275
<ACCUMULATED-GAINS-PRIOR> 1,555
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 333
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 743
<AVERAGE-NET-ASSETS> 6,657
<PER-SHARE-NAV-BEGIN> 13.18
<PER-SHARE-NII> 0.15
<PER-SHARE-GAIN-APPREC> 0.67
<PER-SHARE-DIVIDEND> 0.14
<PER-SHARE-DISTRIBUTIONS> 0.87
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.13
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 35,406
<INVESTMENTS-AT-VALUE> 39,673
<RECEIVABLES> 801
<ASSETS-OTHER> 18
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 40,492
<PAYABLE-FOR-SECURITIES> 569
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 115
<TOTAL-LIABILITIES> 684
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 35,234
<SHARES-COMMON-STOCK> 1,559
<SHARES-COMMON-PRIOR> 935
<ACCUMULATED-NII-CURRENT> 56
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 248
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,270
<NET-ASSETS> 39,808
<DIVIDEND-INCOME> 165
<INTEREST-INCOME> 599
<OTHER-INCOME> 0
<EXPENSES-NET> 525
<NET-INVESTMENT-INCOME> 239
<REALIZED-GAINS-CURRENT> 228
<APPREC-INCREASE-CURRENT> 2,767
<NET-CHANGE-FROM-OPS> 3,234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 175
<DISTRIBUTIONS-OF-GAINS> 1,280
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 10,433
<NUMBER-OF-SHARES-REDEEMED> 3,138
<SHARES-REINVESTED> 1,450
<NET-CHANGE-IN-ASSETS> 22,250
<ACCUMULATED-NII-PRIOR> 155
<ACCUMULATED-GAINS-PRIOR> 1,751
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 258
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 576
<AVERAGE-NET-ASSETS> 17,875
<PER-SHARE-NAV-BEGIN> 14.34
<PER-SHARE-NII> 0.15
<PER-SHARE-GAIN-APPREC> 1.76
<PER-SHARE-DIVIDEND> 0.15
<PER-SHARE-DISTRIBUTIONS> 1.50
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.75
<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 BALANCED PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 35,406
<INVESTMENTS-AT-VALUE> 39,673
<RECEIVABLES> 801
<ASSETS-OTHER> 18
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 40,492
<PAYABLE-FOR-SECURITIES> 569
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 115
<TOTAL-LIABILITIES> 684
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 35,234
<SHARES-COMMON-STOCK> 808
<SHARES-COMMON-PRIOR> 180
<ACCUMULATED-NII-CURRENT> 56
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 248
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,270
<NET-ASSETS> 39,808
<DIVIDEND-INCOME> 165
<INTEREST-INCOME> 599
<OTHER-INCOME> 0
<EXPENSES-NET> 525
<NET-INVESTMENT-INCOME> 239
<REALIZED-GAINS-CURRENT> 228
<APPREC-INCREASE-CURRENT> 2,767
<NET-CHANGE-FROM-OPS> 3,234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 17
<DISTRIBUTIONS-OF-GAINS> 260
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9,430
<NUMBER-OF-SHARES-REDEEMED> 685
<SHARES-REINVESTED> 270
<NET-CHANGE-IN-ASSETS> 22,250
<ACCUMULATED-NII-PRIOR> 155
<ACCUMULATED-GAINS-PRIOR> 1,751
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 258
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 576
<AVERAGE-NET-ASSETS> 5,246
<PER-SHARE-NAV-BEGIN> 14.33
<PER-SHARE-NII> 0.06
<PER-SHARE-GAIN-APPREC> 1.76
<PER-SHARE-DIVIDEND> 0.06
<PER-SHARE-DISTRIBUTIONS> 1.41
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.74
<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 BALANCED PORTFOLIO
FOR THE PERIOD ENDED OCTOBER 31, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 35,406
<INVESTMENTS-AT-VALUE> 39,673
<RECEIVABLES> 801
<ASSETS-OTHER> 18
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 40,492
<PAYABLE-FOR-SECURITIES> 569
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 115
<TOTAL-LIABILITIES> 684
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 35,234
<SHARES-COMMON-STOCK> 332
<SHARES-COMMON-PRIOR> 109
<ACCUMULATED-NII-CURRENT> 56
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 248
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,270
<NET-ASSETS> 39,808
<DIVIDEND-INCOME> 165
<INTEREST-INCOME> 599
<OTHER-INCOME> 0
<EXPENSES-NET> 525
<NET-INVESTMENT-INCOME> 239
<REALIZED-GAINS-CURRENT> 228
<APPREC-INCREASE-CURRENT> 2,767
<NET-CHANGE-FROM-OPS> 3,234
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 12
<DISTRIBUTIONS-OF-GAINS> 158
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,699
<NUMBER-OF-SHARES-REDEEMED> 1,705
<SHARES-REINVESTED> 164
<NET-CHANGE-IN-ASSETS> 22,250
<ACCUMULATED-NII-PRIOR> 155
<ACCUMULATED-GAINS-PRIOR> 1,751
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 258
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 576
<AVERAGE-NET-ASSETS> 2,695
<PER-SHARE-NAV-BEGIN> 14.33
<PER-SHARE-NII> 0.07
<PER-SHARE-GAIN-APPREC> 1.76
<PER-SHARE-DIVIDEND> 0.07
<PER-SHARE-DISTRIBUTIONS> 1.42
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.74
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 18,713
<INVESTMENTS-AT-VALUE> 19,388
<RECEIVABLES> 489
<ASSETS-OTHER> 24
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 19,901
<PAYABLE-FOR-SECURITIES> 250
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 87
<TOTAL-LIABILITIES> 337
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 19,035
<SHARES-COMMON-STOCK> 1,522
<SHARES-COMMON-PRIOR> 1,593
<ACCUMULATED-NII-CURRENT> 42
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (190)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 677
<NET-ASSETS> 19,564
<DIVIDEND-INCOME> 11
<INTEREST-INCOME> 1,360
<OTHER-INCOME> 0
<EXPENSES-NET> 327
<NET-INVESTMENT-INCOME> 1,044
<REALIZED-GAINS-CURRENT> 254
<APPREC-INCREASE-CURRENT> (129)
<NET-CHANGE-FROM-OPS> 1,169
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 920
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,795
<NUMBER-OF-SHARES-REDEEMED> 4,182
<SHARES-REINVESTED> 711
<NET-CHANGE-IN-ASSETS> 2,358
<ACCUMULATED-NII-PRIOR> 1,102
<ACCUMULATED-GAINS-PRIOR> 328
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 152
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 327
<AVERAGE-NET-ASSETS> 14,587
<PER-SHARE-NAV-BEGIN> 9.75
<PER-SHARE-NII> 0.61
<PER-SHARE-GAIN-APPREC> 0.10
<PER-SHARE-DIVIDEND> 0.62
<PER-SHARE-DISTRIBUTIONS> 0.62
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.84
<EXPENSE-RATIO> 1.83
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 18,713
<INVESTMENTS-AT-VALUE> 19,388
<RECEIVABLES> 489
<ASSETS-OTHER> 24
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 19,901
<PAYABLE-FOR-SECURITIES> 250
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 87
<TOTAL-LIABILITIES> 337
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 19,035
<SHARES-COMMON-STOCK> 243
<SHARES-COMMON-PRIOR> 77
<ACCUMULATED-NII-CURRENT> 42
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (190)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 677
<NET-ASSETS> 19,564
<DIVIDEND-INCOME> 11
<INTEREST-INCOME> 1,360
<OTHER-INCOME> 0
<EXPENSES-NET> 327
<NET-INVESTMENT-INCOME> 1,044
<REALIZED-GAINS-CURRENT> 254
<APPREC-INCREASE-CURRENT> (129)
<NET-CHANGE-FROM-OPS> 1,169
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 66
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,228
<NUMBER-OF-SHARES-REDEEMED> 646
<SHARES-REINVESTED> 59
<NET-CHANGE-IN-ASSETS> 2,358
<ACCUMULATED-NII-PRIOR> 1,102
<ACCUMULATED-GAINS-PRIOR> 328
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 152
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 327
<AVERAGE-NET-ASSETS> 1,232
<PER-SHARE-NAV-BEGIN> 9.75
<PER-SHARE-NII> 0.54
<PER-SHARE-GAIN-APPREC> 0.10
<PER-SHARE-DIVIDEND> 0.56
<PER-SHARE-DISTRIBUTIONS> 0.56
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.83
<EXPENSE-RATIO> 2.48
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 18,713
<INVESTMENTS-AT-VALUE> 19,388
<RECEIVABLES> 489
<ASSETS-OTHER> 24
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 19,901
<PAYABLE-FOR-SECURITIES> 250
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 87
<TOTAL-LIABILITIES> 337
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 19,035
<SHARES-COMMON-STOCK> 224
<SHARES-COMMON-PRIOR> 95
<ACCUMULATED-NII-CURRENT> 42
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (190)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 677
<NET-ASSETS> 19,564
<DIVIDEND-INCOME> 11
<INTEREST-INCOME> 1,360
<OTHER-INCOME> 0
<EXPENSES-NET> 327
<NET-INVESTMENT-INCOME> 1,044
<REALIZED-GAINS-CURRENT> 254
<APPREC-INCREASE-CURRENT> (129)
<NET-CHANGE-FROM-OPS> 1,169
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 72
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,584
<NUMBER-OF-SHARES-REDEEMED> 1,370
<SHARES-REINVESTED> 68
<NET-CHANGE-IN-ASSETS> 2,358
<ACCUMULATED-NII-PRIOR> 1,102
<ACCUMULATED-GAINS-PRIOR> 328
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 152
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 327
<AVERAGE-NET-ASSETS> 1,213
<PER-SHARE-NAV-BEGIN> 9.75
<PER-SHARE-NII> 0.56
<PER-SHARE-GAIN-APPREC> 0.10
<PER-SHARE-DIVIDEND> 0.57
<PER-SHARE-DISTRIBUTIONS> 0.57
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.84
<EXPENSE-RATIO> 2.38
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 72,262
<INVESTMENTS-AT-VALUE> 71,916
<RECEIVABLES> 1,620
<ASSETS-OTHER> 9
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 73,545
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 937
<TOTAL-LIABILITIES> 937
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 71,217
<SHARES-COMMON-STOCK> 6,090
<SHARES-COMMON-PRIOR> 5,986
<ACCUMULATED-NII-CURRENT> 293
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,445
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (347)
<NET-ASSETS> 72,608
<DIVIDEND-INCOME> 469
<INTEREST-INCOME> 5,143
<OTHER-INCOME> 0
<EXPENSES-NET> 961
<NET-INVESTMENT-INCOME> 4,651
<REALIZED-GAINS-CURRENT> 1,445
<APPREC-INCREASE-CURRENT> (3,738)
<NET-CHANGE-FROM-OPS> 2,358
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 4,224
<DISTRIBUTIONS-OF-GAINS> 1,318
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 52,552
<NUMBER-OF-SHARES-REDEEMED> 55,591
<SHARES-REINVESTED> 4,242
<NET-CHANGE-IN-ASSETS> 1,755
<ACCUMULATED-NII-PRIOR> 4,938
<ACCUMULATED-GAINS-PRIOR> 1,592
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 442
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 961
<AVERAGE-NET-ASSETS> 66,123
<PER-SHARE-NAV-BEGIN> 10.96
<PER-SHARE-NII> 0.69
<PER-SHARE-GAIN-APPREC> (0.30)
<PER-SHARE-DIVIDEND> 0.70
<PER-SHARE-DISTRIBUTIONS> 0.92
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.43
<EXPENSE-RATIO> 1.24
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 72,262
<INVESTMENTS-AT-VALUE> 71,916
<RECEIVABLES> 1,620
<ASSETS-OTHER> 9
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 73,545
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 937
<TOTAL-LIABILITIES> 937
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 71,217
<SHARES-COMMON-STOCK> 484
<SHARES-COMMON-PRIOR> 161
<ACCUMULATED-NII-CURRENT> 293
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,445
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (347)
<NET-ASSETS> 72,608
<DIVIDEND-INCOME> 469
<INTEREST-INCOME> 5,143
<OTHER-INCOME> 0
<EXPENSES-NET> 961
<NET-INVESTMENT-INCOME> 4,651
<REALIZED-GAINS-CURRENT> 1,445
<APPREC-INCREASE-CURRENT> (3,738)
<NET-CHANGE-FROM-OPS> 2,358
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 170
<DISTRIBUTIONS-OF-GAINS> 38
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4,137
<NUMBER-OF-SHARES-REDEEMED> 848
<SHARES-REINVESTED> 161
<NET-CHANGE-IN-ASSETS> 1,755
<ACCUMULATED-NII-PRIOR> 4,938
<ACCUMULATED-GAINS-PRIOR> 1,592
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 442
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 961
<AVERAGE-NET-ASSETS> 2,989
<PER-SHARE-NAV-BEGIN> 10.96
<PER-SHARE-NII> 0.61
<PER-SHARE-GAIN-APPREC> (0.30)
<PER-SHARE-DIVIDEND> 0.63
<PER-SHARE-DISTRIBUTIONS> 0.85
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.42
<EXPENSE-RATIO> 1.89
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 72,262
<INVESTMENTS-AT-VALUE> 71,916
<RECEIVABLES> 1,620
<ASSETS-OTHER> 9
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 73,545
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 937
<TOTAL-LIABILITIES> 937
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 71,217
<SHARES-COMMON-STOCK> 391
<SHARES-COMMON-PRIOR> 318
<ACCUMULATED-NII-CURRENT> 293
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 1,445
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (347)
<NET-ASSETS> 72,608
<DIVIDEND-INCOME> 469
<INTEREST-INCOME> 5,143
<OTHER-INCOME> 0
<EXPENSES-NET> 961
<NET-INVESTMENT-INCOME> 4,651
<REALIZED-GAINS-CURRENT> 1,445
<APPREC-INCREASE-CURRENT> (3,738)
<NET-CHANGE-FROM-OPS> 2,358
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 274
<DISTRIBUTIONS-OF-GAINS> 77
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 26,628
<NUMBER-OF-SHARES-REDEEMED> 26,102
<SHARES-REINVESTED> 319
<NET-CHANGE-IN-ASSETS> 1,755
<ACCUMULATED-NII-PRIOR> 4,938
<ACCUMULATED-GAINS-PRIOR> 1,592
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 442
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 961
<AVERAGE-NET-ASSETS> 4,547
<PER-SHARE-NAV-BEGIN> 10.96
<PER-SHARE-NII> 0.62
<PER-SHARE-GAIN-APPREC> (0.30)
<PER-SHARE-DIVIDEND> 0.64
<PER-SHARE-DISTRIBUTIONS> 0.86
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.42
<EXPENSE-RATIO> 1.79
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 22,883
<INVESTMENTS-AT-VALUE> 24,053
<RECEIVABLES> 427
<ASSETS-OTHER> 171
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 24,651
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 77
<TOTAL-LIABILITIES> 77
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,943
<SHARES-COMMON-STOCK> 1,869
<SHARES-COMMON-PRIOR> 1,985
<ACCUMULATED-NII-CURRENT> 51
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 410
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,170
<NET-ASSETS> 24,574
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,296
<OTHER-INCOME> 0
<EXPENSES-NET> 306
<NET-INVESTMENT-INCOME> 990
<REALIZED-GAINS-CURRENT> 449
<APPREC-INCREASE-CURRENT> 233
<NET-CHANGE-FROM-OPS> 1,672
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 925
<DISTRIBUTIONS-OF-GAINS> 306
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,075
<NUMBER-OF-SHARES-REDEEMED> 7,276
<SHARES-REINVESTED> 832
<NET-CHANGE-IN-ASSETS> (44)
<ACCUMULATED-NII-PRIOR> 1,130
<ACCUMULATED-GAINS-PRIOR> 286
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 147
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 316
<AVERAGE-NET-ASSETS> 22,946
<PER-SHARE-NAV-BEGIN> 11.75
<PER-SHARE-NII> 0.48
<PER-SHARE-GAIN-APPREC> 0.34
<PER-SHARE-DIVIDEND> 0.48
<PER-SHARE-DISTRIBUTIONS> 0.63
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.94
<EXPENSE-RATIO> 1.23
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 22,883
<INVESTMENTS-AT-VALUE> 24,053
<RECEIVABLES> 427
<ASSETS-OTHER> 171
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 24,651
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 77
<TOTAL-LIABILITIES> 77
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,943
<SHARES-COMMON-STOCK> 54
<SHARES-COMMON-PRIOR> 32
<ACCUMULATED-NII-CURRENT> 51
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 410
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,170
<NET-ASSETS> 24,574
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,296
<OTHER-INCOME> 0
<EXPENSES-NET> 306
<NET-INVESTMENT-INCOME> 990
<REALIZED-GAINS-CURRENT> 449
<APPREC-INCREASE-CURRENT> 233
<NET-CHANGE-FROM-OPS> 1,672
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 14
<DISTRIBUTIONS-OF-GAINS> 4
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 347
<NUMBER-OF-SHARES-REDEEMED> 88
<SHARES-REINVESTED> 13
<NET-CHANGE-IN-ASSETS> (44)
<ACCUMULATED-NII-PRIOR> 1,130
<ACCUMULATED-GAINS-PRIOR> 286
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 147
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 316
<AVERAGE-NET-ASSETS> 407
<PER-SHARE-NAV-BEGIN> 11.74
<PER-SHARE-NII> 0.41
<PER-SHARE-GAIN-APPREC> 0.34
<PER-SHARE-DIVIDEND> 0.40
<PER-SHARE-DISTRIBUTIONS> 0.55
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.94
<EXPENSE-RATIO> 1.88
<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, 1998, 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> 12-MOS
<FISCAL-YEAR-END> OCT-31-1998
<PERIOD-END> OCT-31-1998
<EXCHANGE-RATE> 1
<INVESTMENTS-AT-COST> 22,883
<INVESTMENTS-AT-VALUE> 24,053
<RECEIVABLES> 427
<ASSETS-OTHER> 171
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 24,651
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 77
<TOTAL-LIABILITIES> 77
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,943
<SHARES-COMMON-STOCK> 135
<SHARES-COMMON-PRIOR> 78
<ACCUMULATED-NII-CURRENT> 51
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 410
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1,170
<NET-ASSETS> 24,574
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,296
<OTHER-INCOME> 0
<EXPENSES-NET> 306
<NET-INVESTMENT-INCOME> 990
<REALIZED-GAINS-CURRENT> 449
<APPREC-INCREASE-CURRENT> 233
<NET-CHANGE-FROM-OPS> 1,672
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 40
<DISTRIBUTIONS-OF-GAINS> 12
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,167
<NUMBER-OF-SHARES-REDEEMED> 1,530
<SHARES-REINVESTED> 45
<NET-CHANGE-IN-ASSETS> (44)
<ACCUMULATED-NII-PRIOR> 1,130
<ACCUMULATED-GAINS-PRIOR> 286
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 147
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 316
<AVERAGE-NET-ASSETS> 1,072
<PER-SHARE-NAV-BEGIN> 11.75
<PER-SHARE-NII> 0.45
<PER-SHARE-GAIN-APPREC> 0.34
<PER-SHARE-DIVIDEND> 0.45
<PER-SHARE-DISTRIBUTIONS> 0.60
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.94
<EXPENSE-RATIO> 1.48
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
<PAGE>
</TABLE>
