<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000797657
<NAME> BT INVESTMENT FUNDS
<SERIES>
<NUMBER> 24
<NAME> PRESERVATION PLUS INCOME FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-END> MAR-31-2000
<INVESTMENTS-AT-COST> 0
<INVESTMENTS-AT-VALUE> 371954
<RECEIVABLES> 0
<ASSETS-OTHER> 5227
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 377181
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (79129)
<TOTAL-LIABILITIES> (79129)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 298052
<SHARES-COMMON-STOCK> 29805
<SHARES-COMMON-PRIOR> 11759
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 570
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (570)
<NET-ASSETS> 298052
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3800
<OTHER-INCOME> 0
<EXPENSES-NET> (347)
<NET-INVESTMENT-INCOME> 3453
<REALIZED-GAINS-CURRENT> 740
<APPREC-INCREASE-CURRENT> (740)
<NET-CHANGE-FROM-OPS> 3453
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3453)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 20089
<NUMBER-OF-SHARES-REDEEMED> (2447)
<SHARES-REINVESTED> 404
<NET-CHANGE-IN-ASSETS> 180463
<ACCUMULATED-NII-PRIOR> 2824
<ACCUMULATED-GAINS-PRIOR> (170)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (31386)
<AVERAGE-NET-ASSETS> 109402
<PER-SHARE-NAV-BEGIN> 10.00
<PER-SHARE-NII> .32
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (0.32)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.00
<EXPENSE-RATIO> 57.22
</TABLE>
