WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000797480
<NAME> SMITH BARNEY SECTOR SERIES FUNDS
<SERIES>
<NUMBER> 4
<NAME> SECTOR TECHNOLOGY FUND - CLASS B
<S> <C>
<PERIOD-TYPE> 2-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> APR-30-2000
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<PAYABLE-FOR-SECURITIES> 4,127,648
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 4,127,648
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 175,134,420
<SHARES-COMMON-STOCK> 6,049,977
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (358,855)
<ACCUMULATED-NET-GAINS> (86,732)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (7,422,277)
<NET-ASSETS> 167,266,556
<DIVIDEND-INCOME> 12,328
<INTEREST-INCOME> 91,627
<OTHER-INCOME> 0
<EXPENSES-NET> 462,810
<NET-INVESTMENT-INCOME> (358,855)
<REALIZED-GAINS-CURRENT> (86,732)
<APPREC-INCREASE-CURRENT> (7,422,277)
<NET-CHANGE-FROM-OPS> (7,867,864)
<EQUALIZATION> 0
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<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 179,293,586
<NUMBER-OF-SHARES-REDEEMED> (4,159,166)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 167,266,556
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 201,616
<INTEREST-EXPENSE> 0
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<PER-SHARE-NAV-BEGIN> 11.40
<PER-SHARE-NII> (0.03)
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<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 11.17
<EXPENSE-RATIO> 2.35
</TABLE>
