N-MFP/A LIVE N 2010-11-30 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 55 55 2896717509.51 281339795.33 154074687.81 3023982617.03 0.0016 1.0000 2010-11-30 1.0000 2010-11-30 C000016429 2500.00 3023982617.03 1.00 -39470505.70 74256972.05 113727477.75 0.0001 1.0000 2010-11-30 1.0000 2010-11-30 U.S. Treasury U.S. Treasury 0.149 912795W98 Treasury Debt First Tier Security 2010-12-02 2010-12-02 N N N 175000000.00 174999275.71 0.0579 N 174999650.00 174999650.00 U.S. Treasury U.S. Treasury 0.136 912795X30 Treasury Debt First Tier Security 2010-12-09 2010-12-09 N N N 200000000.00 199993955.56 0.0661 N 199996000.00 199996000.00 U.S. Treasury U.S. Treasury 4.375 912828EQ9 Treasury Debt First Tier Security 2010-12-15 2010-12-15 N N N 50000000.00 50076114.77 0.0166 N 50085950.00 50085950.00 U.S. Treasury U.S. Treasury 0.137 912795UK5 Treasury Debt First Tier Security 2010-12-16 2010-12-16 N N N 137000000.00 136992176.67 0.0453 N 136993835.00 136993835.00 U.S. Treasury U.S. Treasury 0.145 912795X48 Treasury Debt First Tier Security 2010-12-23 2010-12-23 N N N 140000000.00 139987594.45 0.0463 N 139987540.00 139987540.00 U.S. Treasury U.S. Treasury 0.150 912795X55 Treasury Debt First Tier Security 2010-12-30 2010-12-30 N N N 100000000.00 99987916.66 0.0331 N 99987100.00 99987100.00 U.S. Treasury U.S. Treasury 0.109 912795X71 Treasury Debt First Tier Security 2011-01-06 2011-01-06 N N N 425000000.00 424953775.00 0.1405 N 424946875.00 424946875.00 U.S. Treasury U.S. Treasury 0.158 912795UX7 Treasury Debt First Tier Security 2011-01-13 2011-01-13 N N N 265000000.00 264949934.88 0.0876 N 264959720.00 264959720.00 U.S. Treasury U.S. Treasury 0.124 912795X89 Treasury Debt First Tier Security 2011-01-20 2011-01-20 N N N 285000000.00 284951048.59 0.0942 N 284946420.00 284946420.00 U.S. Treasury U.S. Treasury 0.081 912795X97 Treasury Debt First Tier Security 2011-01-27 2011-01-27 N N N 290000000.00 289934687.09 0.0959 N 289935620.00 289935620.00 U.S. Treasury U.S. Treasury 0.875 912828JY7 Treasury Debt First Tier Security 2011-01-31 2011-01-31 N N N 120000000.00 120113675.75 0.0397 N 120154680.00 120154680.00 U.S. Treasury U.S. Treasury 0.218 912795V40 Treasury Debt First Tier Security 2011-02-10 2011-02-10 N N N 45000000.00 44980691.95 0.0149 N 44988030.00 44988030.00 U.S. Treasury U.S. Treasury 5 9128276T4 Treasury Debt First Tier Security 2011-02-15 2011-02-15 N N N 200000000.00 202001824.64 0.0668 N 202015600.00 202015600.00 U.S. Treasury U.S. Treasury 0.875 912828KE9 Treasury Debt First Tier Security 2011-02-28 2011-02-28 N N N 115000000.00 115194739.83 0.0381 N 115211140.00 115211140.00 U.S. Treasury U.S. Treasury 4.5 912828EX4 Treasury Debt First Tier Security 2011-02-28 2011-02-28 N N N 25000000.00 25261066.67 0.0084 N 25267575.00 25267575.00 U.S. Treasury U.S. Treasury 0.176 9127952D2 Treasury Debt First Tier Security 2011-03-03 2011-03-03 N N N 30000000.00 29986653.33 0.0099 N 29988120.00 29988120.00 U.S. Treasury U.S. Treasury 0.184 912795V99 Treasury Debt First Tier Security 2011-03-10 2011-03-10 N N N 100000000.00 99949400.00 0.0331 N 99956000.00 99956000.00 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 25069198.11 0.0083 N 25072275.00 25072275.00 U.S. Treasury U.S. Treasury 0.195 9127952S9 Treasury Debt First Tier Security 2011-05-26 2011-05-26 N N N 25000000.00 24976166.66 0.0083 N 24976775.00 24976775.00 U.S. Treasury U.S. Treasury 1 912828LG3 Treasury Debt First Tier Security 2011-07-31 2011-07-31 N N N 50000000.00 50235587.30 0.0166 N 50257800.00 50257800.00 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 25812453.68 0.0085 N 25814450.00 25814450.00 U.S. Treasury U.S. Treasury 4.5 912828FU9 Treasury Debt First Tier Security 2011-09-30 2011-09-30 N N N 25000000.00 25883394.47 0.0086 N 25875975.00 25875975.00 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 15213862.45 0.0050 N 15206835.00 15206835.00 U.S. Treasury U.S. Treasury 1.125 912828KA7 Treasury Debt First Tier Security 2011-12-15 2011-12-15 N N N 25000000.00 25212315.29 0.0083 N 25207025.00 25207025.00