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<PAGE> PAGE 2
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<PAGE> PAGE 3
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<PAGE> PAGE 4
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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<PAGE> PAGE 7
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<PAGE> PAGE 8
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<PAGE> PAGE 10
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<PAGE> PAGE 11
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<PAGE> PAGE 12
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<PAGE> PAGE 13
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<PAGE> PAGE 14
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<PAGE> PAGE 15
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<PAGE> PAGE 16
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<PAGE> PAGE 17
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<PAGE> PAGE 19
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<PAGE> PAGE 20
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SIGNATURE HARVEY M. ROSEN
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from CS First
Boston Institutional Tax-Exempt Money Market Fund, form NSAR B 12/31/94 and is
qualified in its entirety by reference to such financial statements.
<CIK> 0000833044
<NAME> FIRST BOSTON INVESTMENT FUNDS, INC.
<SERIES>
<NUMBER> 3
<NAME> INSTITUTIONAL TAX-EXEMPT MONEY MARKET FUND
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1994
<PERIOD-START> JAN-1-1994
<PERIOD-END> DEC-31-1994
<INVESTMENTS-AT-COST> 51,607
<INVESTMENTS-AT-VALUE> 51,607
<RECEIVABLES> 660
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 1,198
<TOTAL-ASSETS> 53,465
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 242
<TOTAL-LIABILITIES> 242
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 53,351
<SHARES-COMMON-STOCK> 53,351
<SHARES-COMMON-PRIOR> 98,527
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (128)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 53,223
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 4,737
<OTHER-INCOME> 0
<EXPENSES-NET> (201)
<NET-INVESTMENT-INCOME> 4,536
<REALIZED-GAINS-CURRENT> (124)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 4,412
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (4,536)
<DISTRIBUTIONS-OF-GAINS> (2)
<DISTRIBUTIONS-OTHER> (4)
<NUMBER-OF-SHARES-SOLD> 1,883,411
<NUMBER-OF-SHARES-REDEEMED> (1,931,711)
<SHARES-REINVESTED> 3,122
<NET-CHANGE-IN-ASSETS> (45,306)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 2
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (240)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (456)
<AVERAGE-NET-ASSETS> 160,097
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> .029
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.029)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.000
<EXPENSE-RATIO> .13
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from CS First
Boston Institutional U.S. Treasury Money Market Fund, from NSAR B 12/31/94 and
is qualified in its entirety by reference to such financial statements.
<CIK> 0000833044
<NAME> FIRST BOSTON INVESTMENT FUNDS, INC.
<SERIES>
<NUMBER> 4
<NAME> INSTITUTIONAL U.S. TREASURY MONEY MARKET FUND
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1994
<PERIOD-START> JAN-1-1994
<PERIOD-END> DEC-12-1994
<INVESTMENTS-AT-COST> 0
<INVESTMENTS-AT-VALUE> 0
<RECEIVABLES> 0
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 51
<TOTAL-ASSETS> 51
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 50
<TOTAL-LIABILITIES> 50
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 27
<SHARES-COMMON-STOCK> 1
<SHARES-COMMON-PRIOR> 165,692
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (26)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 1
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 3,463
<OTHER-INCOME> 0
<EXPENSES-NET> (54)
<NET-INVESTMENT-INCOME> 3,409
<REALIZED-GAINS-CURRENT> (18)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 3,391
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3,409)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 812,990
<NUMBER-OF-SHARES-REDEEMED> (981,538)
<SHARES-REINVESTED> 2,883
<NET-CHANGE-IN-ASSETS> (165,683)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (8)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (132)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (401)
<AVERAGE-NET-ASSETS> 93,314
<PER-SHARE-NAV-BEGIN> 1.000
<PER-SHARE-NII> .037
<PER-SHARE-GAIN-APPREC> .250
<PER-SHARE-DIVIDEND> (.037)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.250
<EXPENSE-RATIO> .06
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from CS First
Boston Institutional Money Market Fund form NSAR B 12/31/94 and is qualified in
its entirety by reference to such financial statements.
<CIK> 0000833044
<NAME> FIRST BOSTON INVESTMENT FUNDS, INC.
<SERIES>
<NUMBER> 1
<NAME> INSTITUTIONAL MONEY MARKET FUND
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1994
<PERIOD-START> JAN-1-1994
<PERIOD-END> DEC-31-1994
<INVESTMENTS-AT-COST> 429,744
<INVESTMENTS-AT-VALUE> 429,744
<RECEIVABLES> 4,545
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 614
<TOTAL-ASSETS> 434,903
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 2,615
<TOTAL-LIABILITIES> 2,615
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 440,816
<SHARES-COMMON-STOCK> 433,441
<SHARES-COMMON-PRIOR> 1,988,252
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (8,528)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 432,288
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 116,415
<OTHER-INCOME> 0
<EXPENSES-NET> (3,119)
<NET-INVESTMENT-INCOME> 113,296
<REALIZED-GAINS-CURRENT> (8,525)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 104,771
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (113,296)
<DISTRIBUTIONS-OF-GAINS> (121)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 62,709,673
<NUMBER-OF-SHARES-REDEEMED> (64,284,322)
<SHARES-REINVESTED> 27,064
<NET-CHANGE-IN-ASSETS> (1,556,231)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 118
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (4,417)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (6,338)
<AVERAGE-NET-ASSETS> 2,944,494
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .04
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.04)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .11
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information extracted from
Institutional Government Fund, form NSAR B 12/31/94 and is qualified in its
entirety by reference to such financial statements.
<CIK> 0000833044
<NAME> FIRST BOSTON INVESTMENT FUNDS, INC.
<SERIES>
<NUMBER> 2
<NAME> INSTITUTIONAL GOVERNMENT FUND
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1994
<PERIOD-START> JAN-1-1994
<PERIOD-END> DEC-31-1994
<INVESTMENTS-AT-COST> 24,677
<INVESTMENTS-AT-VALUE> 24,164
<RECEIVABLES> 222
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 40
<TOTAL-ASSETS> 24,426
<PAYABLE-FOR-SECURITIES> 3,891
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 50
<TOTAL-LIABILITIES> 3,941
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 22,361
<SHARES-COMMON-STOCK> 2,276
<SHARES-COMMON-PRIOR> 3,910
<ACCUMULATED-NII-CURRENT> 112
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,475)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (513)
<NET-ASSETS> 20,485
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,723
<OTHER-INCOME> 35
<EXPENSES-NET> (264)
<NET-INVESTMENT-INCOME> 1,494
<REALIZED-GAINS-CURRENT> (1,456)
<APPREC-INCREASE-CURRENT> (927)
<NET-CHANGE-FROM-OPS> (889)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1,382)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 5,642
<NUMBER-OF-SHARES-REDEEMED> (22,182)
<SHARES-REINVESTED> 1,247
<NET-CHANGE-IN-ASSETS> (17,564)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (19)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (137)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (267)
<AVERAGE-NET-ASSETS> 27,440
<PER-SHARE-NAV-BEGIN> 9.73
<PER-SHARE-NII> .53
<PER-SHARE-GAIN-APPREC> (.78)
<PER-SHARE-DIVIDEND> (.48)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.00
<EXPENSE-RATIO> .96
<AVG-DEBT-OUTSTANDING> 0
<AVG-DEBT-PER-SHARE> 0
</TABLE>
