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SIGNATURE JAMES RIEPE
TITLE VICE PRESIDENT
WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
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<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 12.19
<EXPENSE-RATIO> 0.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000858581
<NAME> EQUITY INDEX 500 FUND
<S> <C>
<PERIOD-TYPE> YEAR
<FISCAL-YEAR-END> DEC-31-1998
<PERIOD-END> DEC-31-1998
<INVESTMENTS-AT-COST> 2294809
<INVESTMENTS-AT-VALUE> 3373329
<RECEIVABLES> 44958
<ASSETS-OTHER> 104
<OTHER-ITEMS-ASSETS> 83424
<TOTAL-ASSETS> 3501815
<PAYABLE-FOR-SECURITIES> 53617
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 100705
<TOTAL-LIABILITIES> 154322
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2254678
<SHARES-COMMON-STOCK> 100277
<SHARES-COMMON-PRIOR> 72343
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (362)
<ACCUMULATED-NET-GAINS> 12076
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 1081101
<NET-ASSETS> 3347493
<DIVIDEND-INCOME> 37463
<INTEREST-INCOME> 2763
<OTHER-INCOME> 0
<EXPENSES-NET> 10263
<NET-INVESTMENT-INCOME> 29963
<REALIZED-GAINS-CURRENT> 63528
<APPREC-INCREASE-CURRENT> 548331
<NET-CHANGE-FROM-OPS> 641822
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (30728)
<DISTRIBUTIONS-OF-GAINS> (8434)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 55811
<NUMBER-OF-SHARES-REDEEMED> (29114)
<SHARES-REINVESTED> 1237
<NET-CHANGE-IN-ASSETS> 1439172
<ACCUMULATED-NII-PRIOR> 403
<ACCUMULATED-GAINS-PRIOR> 1907
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4169
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 10263
<AVERAGE-NET-ASSETS> 2566177
<PER-SHARE-NAV-BEGIN> 26.38
<PER-SHARE-NII> 0.33
<PER-SHARE-GAIN-APPREC> 7.10
<PER-SHARE-DIVIDEND> (0.34)
<PER-SHARE-DISTRIBUTIONS> (0.09)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 33.38
<EXPENSE-RATIO> 0.40
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
