<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000898031
<NAME> LORD ABBETT SECURITIES TRUST
<SERIES>
<NUMBER> 061
<NAME> MICRO-CAP VALUE SERIES - CLASS Y
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> APR-30-2000
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<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 1,233,703
<SHARES-COMMON-STOCK> 117,735
<SHARES-COMMON-PRIOR> 107,076
<ACCUMULATED-NII-CURRENT> 6,401
<OVERDISTRIBUTION-NII> 0
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<OVERDISTRIBUTION-GAINS> 0
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<DIVIDEND-INCOME> 6,709
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<NET-CHANGE-FROM-OPS> 291,174
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (10,546)
<DISTRIBUTIONS-OF-GAINS> (8,011)
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<NUMBER-OF-SHARES-REDEEMED> (25,350)
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<NET-CHANGE-IN-ASSETS> 391,194
<ACCUMULATED-NII-PRIOR> 8,877
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<PER-SHARE-DIVIDEND> (0.09)
<PER-SHARE-DISTRIBUTIONS> (0.07)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 13.10
<EXPENSE-RATIO> 0
</TABLE>
