<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000832545
<NAME> BARR ROSENBERG SERIES TRUST
<SERIES>
<NUMBER> 042
<NAME> AXA ROSENBERG VALUE MARKET NEUTRAL FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> APR-01-2000
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 59601743
<INVESTMENTS-AT-VALUE> 68322443
<RECEIVABLES> 5673521
<ASSETS-OTHER> 64163325
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 138159289
<PAYABLE-FOR-SECURITIES> 943373
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 68326400
<TOTAL-LIABILITIES> 69269773
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 120833378
<SHARES-COMMON-STOCK> 429306<F1>
<SHARES-COMMON-PRIOR> 831238<F1>
<ACCUMULATED-NII-CURRENT> 2623188
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 60591587
<ACCUM-APPREC-OR-DEPREC> 6024537
<NET-ASSETS> 68889516
<DIVIDEND-INCOME> 568249
<INTEREST-INCOME> 2151946
<OTHER-INCOME> 0
<EXPENSES-NET> 1025392
<NET-INVESTMENT-INCOME> 1694803
<REALIZED-GAINS-CURRENT> (4922971)
<APPREC-INCREASE-CURRENT> 4400357
<NET-CHANGE-FROM-OPS> 1172189
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0<F1>
<DISTRIBUTIONS-OF-GAINS> 0<F1>
<DISTRIBUTIONS-OTHER> 0<F1>
<NUMBER-OF-SHARES-SOLD> 708116
<NUMBER-OF-SHARES-REDEEMED> 2447580
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (11667824)
<ACCUMULATED-NII-PRIOR> 928385
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 55668616
<GROSS-ADVISORY-FEES> 636536
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1168212
<AVERAGE-NET-ASSETS> 4385185<F1>
<PER-SHARE-NAV-BEGIN> 7.41<F1>
<PER-SHARE-NII> 0.16<F1>
<PER-SHARE-GAIN-APPREC> (0.04)<F1>
<PER-SHARE-DIVIDEND> 0.00<F1>
<PER-SHARE-DISTRIBUTIONS> 0.00<F1>
<RETURNS-OF-CAPITAL> 0.00<F1>
<PER-SHARE-NAV-END> 7.53<F1>
<EXPENSE-RATIO> 2.23<F1>
<FN>
<F1> Investor Shares
</FN>
</TABLE>
