<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000741375
<NAME> MAS FUNDS
<SERIES>
<NUMBER> 19
<NAME> LIMITED DURATION PORTFOLIO, INSTITUTIONAL CLASS
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 204,981
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<OTHER-ITEMS-LIABILITIES> 578
<TOTAL-LIABILITIES> 28,725
<SENIOR-EQUITY> 0
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<SHARES-COMMON-STOCK> 17,485
<SHARES-COMMON-PRIOR> 15,873
<ACCUMULATED-NII-CURRENT> 175
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<OVERDISTRIBUTION-GAINS> 0
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<DIVIDEND-INCOME> 105
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<OTHER-INCOME> 0
<EXPENSES-NET> (668)
<NET-INVESTMENT-INCOME> 10,433
<REALIZED-GAINS-CURRENT> (1,358)
<APPREC-INCREASE-CURRENT> 1,099
<NET-CHANGE-FROM-OPS> 10,174
<EQUALIZATION> 0
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<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,255
<NUMBER-OF-SHARES-REDEEMED> (4,546)
<SHARES-REINVESTED> 903
<NET-CHANGE-IN-ASSETS> (16,238)
<ACCUMULATED-NII-PRIOR> 353
<ACCUMULATED-GAINS-PRIOR> (4,391)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 485
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 680
<AVERAGE-NET-ASSETS> 157,891
<PER-SHARE-NAV-BEGIN> 10.18
<PER-SHARE-NII> 0.60
<PER-SHARE-GAIN-APPREC> (0.03)
<PER-SHARE-DIVIDEND> (0.58)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.17
<EXPENSE-RATIO> 0.42
</TABLE>
