N-MFP LIVE N 2011-02-28 0000773674 S000005965 1 N N 002-99222 AMERICAN CENTURY INVESTMENT MANAGEMENT, INC. 801-08174 PRICEWATERHOUSECOOPERS, LLP KANSAS CITY MO AMERICAN CENTURY SERVICES, LLC American Century Services, LLC 0000794265 084-01406 N N N Treasury 55 55 2636446119.17 302616422.79 9153814.00 2929908727.96 0.0015 1.0001 2011-02-28 1.0001 2011-02-28 C000016429 2500.00 2929908727.96 1.00 -33066854.01 65949168.25 99016022.26 0.0001 1.0001 2011-02-28 1.0001 2011-02-28 U.S. Treasury U.S. Treasury 0.087 9127952D2 Treasury Debt First Tier Security 2011-03-03 2011-03-03 N N N 285000000.00 284998626.13 0.0973 N 284999145.00 284999145.00 U.S. Treasury U.S. Treasury 0.162 912795V99 Treasury Debt First Tier Security 2011-03-10 2011-03-10 N N N 280000000.00 279988695.00 0.0956 N 279993840.00 279993840.00 U.S. Treasury U.S. Treasury 0.125 9127952G5 Treasury Debt First Tier Security 2011-03-17 2011-03-17 N N N 348000000.00 347980604.47 0.1188 N 347984688.00 347984688.00 U.S. Treasury U.S. Treasury 0.123 9127952H3 Treasury Debt First Tier Security 2011-03-24 2011-03-24 N N N 465000000.00 464963468.35 0.1587 N 464967450.00 464967450.00 U.S. Treasury U.S. Treasury 0.180 9127952J9 Treasury Debt First Tier Security 2011-03-31 2011-03-31 N N N 100000000.00 99985000.00 0.0341 N 99993800.00 99993800.00 U.S. Treasury U.S. Treasury 0.875 912828KH2 Treasury Debt First Tier Security 2011-03-31 2011-03-31 N N N 160000000.00 160101562.51 0.0546 N 160112480.00 160112480.00 U.S. Treasury U.S. Treasury 4.75 912828FA3 Treasury Debt First Tier Security 2011-03-31 2011-03-31 N N N 115000000.00 115433881.21 0.0394 N 115453790.00 115453790.00 U.S. Treasury U.S. Treasury 0.078 912795VD0 Treasury Debt First Tier Security 2011-04-07 2011-04-07 N N N 280000000.00 279977697.23 0.0956 N 279972000.00 279972000.00 U.S. Treasury U.S. Treasury 0.875 912828KL3 Treasury Debt First Tier Security 2011-04-30 2011-04-30 N N N 25000000.00 25027679.25 0.0085 N 25032225.00 25032225.00 U.S. Treasury U.S. Treasury 0.151 9127952S9 Treasury Debt First Tier Security 2011-05-26 2011-05-26 N N N 82000000.00 81970516.34 0.0280 N 81974170.00 81974170.00 U.S. Treasury U.S. Treasury 0.875 912828KU3 Treasury Debt First Tier Security 2011-05-31 2011-05-31 N N N 100000000.00 100175630.00 0.0342 N 100191400.00 100191400.00 U.S. Treasury U.S. Treasury 1 912828LG3 Treasury Debt First Tier Security 2011-07-31 2011-07-31 N N N 50000000.00 50147972.19 0.0171 N 50179700.00 50179700.00 U.S. Treasury U.S. Treasury 4.625 912828FS4 Treasury Debt First Tier Security 2011-08-31 2011-08-31 N N N 25000000.00 25544611.81 0.0087 N 25553725.00 25553725.00 U.S. Treasury U.S. Treasury 4.5 912828FU9 Treasury Debt First Tier Security 2011-09-30 2011-09-30 N N N 50000000.00 51245315.27 0.0175 N 51255850.00 51255850.00 U.S. Treasury U.S. Treasury 4.625 912828FW5 Treasury Debt First Tier Security 2011-10-31 2011-10-31 N N N 25000000.00 25728190.25 0.0088 N 25738275.00 25738275.00 U.S. Treasury U.S. Treasury 1.75 912828JU5 Treasury Debt First Tier Security 2011-11-15 2011-11-15 N N N 15000000.00 15158711.67 0.0052 N 15164070.00 15164070.00 U.S. Treasury U.S. Treasury 4.5 912828GA2 Treasury Debt First Tier Security 2011-11-30 2011-11-30 N N N 60000000.00 61894441.13 0.0211 N 61926600.00 61926600.00 U.S. Treasury U.S. Treasury 1.125 912828KA7 Treasury Debt First Tier Security 2011-12-15 2011-12-15 N N N 105000000.00 105672901.98 0.0361 N 105742455.00 105742455.00 U.S. Treasury U.S. Treasury 1.125 912828KB5 Treasury Debt First Tier Security 2012-01-15 2012-01-15 N N N 50000000.00 50354267.25 0.0172 N 50376950.00 50376950.00 U.S. Treasury U.S. Treasury 1.375 912828KC3 Treasury Debt First Tier Security 2012-02-15 2012-02-15 N N N 10000000.00 10096347.13 0.0034 N 10104690.00 10104690.00