<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000832545
<NAME> BARR ROSENBERG SERIES TRUST
<SERIES>
<NUMBER> 081
<NAME> AXA ROSENBERG ENHANCED 500 FUND
<S> <C>
<PERIOD-TYPE> 4-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> JUN-07-2000
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 4982259
<INVESTMENTS-AT-VALUE> 4846391
<RECEIVABLES> 7239
<ASSETS-OTHER> 18111
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 4871741
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 0
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 5000050
<SHARES-COMMON-STOCK> 500005<F1>
<SHARES-COMMON-PRIOR> 0<F1>
<ACCUMULATED-NII-CURRENT> 10091
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 2532
<ACCUM-APPREC-OR-DEPREC> (135868)
<NET-ASSETS> 4871741
<DIVIDEND-INCOME> 16317
<INTEREST-INCOME> 5674
<OTHER-INCOME> 0
<EXPENSES-NET> 11900
<NET-INVESTMENT-INCOME> 10091
<REALIZED-GAINS-CURRENT> (2532)
<APPREC-INCREASE-CURRENT> (135868)
<NET-CHANGE-FROM-OPS> (128309)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0<F1>
<NUMBER-OF-SHARES-SOLD> 500005
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 4871741
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 7865
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 24900
<AVERAGE-NET-ASSETS> 5035034<F1>
<PER-SHARE-NAV-BEGIN> 10.00<F1>
<PER-SHARE-NII> 0.02<F1>
<PER-SHARE-GAIN-APPREC> (0.28)<F1>
<PER-SHARE-DIVIDEND> 0.00<F1>
<PER-SHARE-DISTRIBUTIONS> 0.00<F1>
<RETURNS-OF-CAPITAL> 0.00<F1>
<PER-SHARE-NAV-END> 9.74<F1>
<EXPENSE-RATIO> 0.75<F1>
<FN>
<F1> Institutional Shares
</FN>
</TABLE>
