N-MFP LIVE N 2011-06-30 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 54 54 2585069073.48 300610623.52 5940520.82 2879739176.18 0.0006 1.0001 2011-06-30 1.0001 2011-06-30 C000016429 2500.00 2879739176.18 1.00 19952312.04 154749078.03 134796765.99 0.0001 1.0001 2011-06-30 1.0001 2011-06-30 U.S. Treasury U.S. Treasury 0.00 9127952X8 Treasury Debt First Tier Security 2011-07-07 2011-07-07 N N N 125000000.00 124999895.83 0.0434 N 124999875.00 124999875.00 U.S. Treasury U.S. Treasury 0.07 9127952Z3 Treasury Debt First Tier Security 2011-07-14 2011-07-14 N N N 35000000.00 34999102.64 0.0122 N 34999965.00 34999965.00 U.S. Treasury U.S. Treasury 0.03 9127953A7 Treasury Debt First Tier Security 2011-07-21 2011-07-21 N N N 425000000.00 424993424.97 0.1476 N 424998300.00 424998300.00 U.S. Treasury U.S. Treasury 0.02 912795X63 Treasury Debt First Tier Security 2011-07-28 2011-07-28 N N N 370000000.00 369995500.00 0.1285 N 369998520.00 369998520.00 U.S. Treasury U.S. Treasury 1 912828LG3 Treasury Debt First Tier Security 2011-07-31 2011-07-31 N N N 50000000.00 50029205.04 0.0174 N 50044950.00 50044950.00 U.S. Treasury U.S. Treasury 0.00 9127953B5 Treasury Debt First Tier Security 2011-08-04 2011-08-04 N N N 325000000.00 324998158.35 0.1129 N 324999350.00 324999350.00 U.S. Treasury U.S. Treasury 0.00 9127953E9 Treasury Debt First Tier Security 2011-08-18 2011-08-18 N N N 200000000.00 199998666.64 0.0695 N 199998600.00 199998600.00 U.S. Treasury U.S. Treasury 0.01 9127952A8 Treasury Debt First Tier Security 2011-08-25 2011-08-25 N N N 145000000.00 144996677.09 0.0504 N 144998840.00 144998840.00 U.S. Treasury U.S. Treasury 4.625 912828FS4 Treasury Debt First Tier Security 2011-08-31 2011-08-31 N N N 163000000.00 164224501.55 0.0570 N 164260805.00 164260805.00 U.S. Treasury U.S. Treasury 0.03 9127953F6 Treasury Debt First Tier Security 2011-09-01 2011-09-01 N N N 243000000.00 242987383.01 0.0844 N 242994897.00 242994897.00 U.S. Treasury U.S. Treasury 0.02 9127953L3 Treasury Debt First Tier Security 2011-09-29 2011-09-29 N N N 20000000.00 19999012.50 0.0069 N 19999400.00 19999400.00 U.S. Treasury U.S. Treasury 1 912828LW8 Treasury Debt First Tier Security 2011-09-30 2011-09-30 N N N 80000000.00 80174219.77 0.0278 N 80196880.00 80196880.00 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 50532036.10 0.0175 N 50562500.00 50562500.00 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 25364095.13 0.0088 N 25381850.00 25381850.00 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 15083951.74 0.0052 N 15094335.00 15094335.00 U.S. Treasury U.S. Treasury 0.75 912828MM9 Treasury Debt First Tier Security 2011-11-30 2011-11-30 N N N 4000000.00 4010937.76 0.0014 N 4011408.00 4011408.00 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 61050930.85 0.0212 N 61106280.00 61106280.00 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 105388839.56 0.0366 N 105496335.00 105496335.00 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 50219202.87 0.0174 N 50277350.00 50277350.00 U.S. Treasury U.S. Treasury 0.875 912828MJ6 Treasury Debt First Tier Security 2012-01-31 2012-01-31 N N N 60000000.00 60246093.79 0.0209 N 60274260.00 60274260.00 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 10062858.95 0.0035 N 10078520.00 10078520.00 U.S. Treasury U.S. Treasury 4.5 912828GQ7 Treasury Debt First Tier Security 2012-04-30 2012-04-30 N N N 20000000.00 20714379.34 0.0072 N 20716420.00 20716420.00