<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
FROM THE ANNUAL REPORT OF AMERICAN CENTURY INVESTMENT
TRUST AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
REPORT.
</LEGEND>
<CIK> 0000908406
<NAME> AMERICAN CENTURY INVESTMENT TRUST
<SERIES>
<NUMBER> 11
<NAME> PRIME MONEY MARKET FUND- INVESTOR CLASS
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> AUG-31-2000
<PERIOD-END> FEB-28-2001
<INVESTMENTS-AT-COST> 2,858,599,852
<INVESTMENTS-AT-VALUE> 2,858,599,852
<RECEIVABLES> 12,837,284
<ASSETS-OTHER> 1,877,489
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2,873,314,625
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,472,977
<TOTAL-LIABILITIES> 1,472,977
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 0
<SHARES-COMMON-STOCK> 2,866,299,215
<SHARES-COMMON-PRIOR> 2,922,181,591
<ACCUMULATED-NII-CURRENT> (357,815)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 2,871,841,648
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 9,311,921
<OTHER-INCOME> 0
<EXPENSES-NET> 8,626,010
<NET-INVESTMENT-INCOME> 84,545,911
<REALIZED-GAINS-CURRENT> (1,161)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 84,544,750
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (84,388,809)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,975,943,769
<NUMBER-OF-SHARES-REDEEMED> (2,131,601,181)
<SHARES-REINVESTED> 99,775,036
<NET-CHANGE-IN-ASSETS> (54,782,034)
<ACCUMULATED-NII-PRIOR> (356,686)
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 8,549,949
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 8,626,010
<AVERAGE-NET-ASSETS> 2,873,374,346
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0.00
<PER-SHARE-DIVIDEND> (0.03)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.59
</TABLE>
