<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0001095664
<NAME> LORD ABBETT LARGE - CAP GROWTH FUND
<SERIES>
<NUMBER> 005
<NAME> CLASS Y
<S> <C>
<PERIOD-TYPE> 8-MOS
<FISCAL-YEAR-END> JUL-31-2000
<PERIOD-START> DEC-15-1999
<PERIOD-END> JUL-31-2000
<INVESTMENTS-AT-COST> 88,886,919
<INVESTMENTS-AT-VALUE> 94,415,553
<RECEIVABLES> 1,020,445
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 95,435,998
<PAYABLE-FOR-SECURITIES> 1,317,049
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 302,358
<TOTAL-LIABILITIES> 1,619,407
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 88,471,952
<SHARES-COMMON-STOCK> 113
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> (35,561)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (148,434)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5,528,634
<NET-ASSETS> 1,187
<DIVIDEND-INCOME> 108,160
<INTEREST-INCOME> 28,453
<OTHER-INCOME> 0
<EXPENSES-NET> 303,406
<NET-INVESTMENT-INCOME> (166,793)
<REALIZED-GAINS-CURRENT> (148,434)
<APPREC-INCREASE-CURRENT> 1,583,606
<NET-CHANGE-FROM-OPS> 1,268,379
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 113
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 93,816,591
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 168,449
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 420,944
<AVERAGE-NET-ASSETS> 1,203
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> (0.01)
<PER-SHARE-GAIN-APPREC> 0.55
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.54
<EXPENSE-RATIO> 0.59
</TABLE>
