<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 01
<NAME> LARGE COMPANY INDEX
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 651,489,403
<INVESTMENTS-AT-VALUE> 1,033,803,031
<RECEIVABLES> 1,425,066
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 5,469
<TOTAL-ASSETS> 1,035,233,566
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 3,262,463
<TOTAL-LIABILITIES> 3,262,463
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 552,479,021
<SHARES-COMMON-STOCK> 25,321,335
<SHARES-COMMON-PRIOR> 25,276,074
<ACCUMULATED-NII-CURRENT> 5,623,978
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 91,893,756
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 381,974,348
<NET-ASSETS> 1,031,971,103
<DIVIDEND-INCOME> 5,873,310
<INTEREST-INCOME> 372,308
<OTHER-INCOME> 0
<EXPENSES-NET> 2,470,069
<NET-INVESTMENT-INCOME> 3,776,001
<REALIZED-GAINS-CURRENT> 34,669,238
<APPREC-INCREASE-CURRENT> (73,443,849)
<NET-CHANGE-FROM-OPS> (34,999,062)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2,340,773
<NUMBER-OF-SHARES-REDEEMED> (2,295,512)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (33,158,717)
<ACCUMULATED-NII-PRIOR> 1,847,977
<ACCUMULATED-GAINS-PRIOR> 57,224,518
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,470,069
<AVERAGE-NET-ASSETS> 1,042,035,800
<PER-SHARE-NAV-BEGIN> 42.14
<PER-SHARE-NII> 0
<PER-SHARE-GAIN-APPREC> (1.539)
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 40.75
<EXPENSE-RATIO> 0.47
</TABLE>
