<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000894632
<NAME> PAINEWEBBER SECURITIES TRUST
<SERIES>
<NUMBER> 4
<NAME> STRATEGIC INCOME FUND CLASS Y
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> NOV-30-2000
<PERIOD-START> DEC-01-1999
<PERIOD-END> MAY-31-2000
<INVESTMENTS-AT-COST> 1071
<INVESTMENTS-AT-VALUE> 989
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<SENIOR-LONG-TERM-DEBT> 0
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<TOTAL-LIABILITIES> 91
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<PAID-IN-CAPITAL-COMMON> 1164
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<SHARES-COMMON-PRIOR> 132
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<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (172)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (83)
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<EXPENSES-NET> (5)
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<REALIZED-GAINS-CURRENT> (71)
<APPREC-INCREASE-CURRENT> (2)
<NET-CHANGE-FROM-OPS> (31)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (38)
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<NUMBER-OF-SHARES-REDEEMED> (37)
<SHARES-REINVESTED> 4
<NET-CHANGE-IN-ASSETS> (170)
<ACCUMULATED-NII-PRIOR> 2
<ACCUMULATED-GAINS-PRIOR> (106)
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<EXPENSE-RATIO> 1.12
</TABLE>