Notes on the C, F, G, S and I funds

The G Fund (Government Securities Investment Fund) is invested in special issues of U.S. Treasury securities. The F Fund (Fixed Income Index Investment Fund) is invested in the Barclays U.S. Debt Index Fund, which tracks the Lehman Brothers U.S. Aggregate bond index. The C Fund (Common Stock Index Investment Fund) is invested in the Barclays Equity Index Fund, which tracks the S&P 500 stock index.

The S Fund (Small Capitalization Stock Index Investment Fund) is invested in the Barclays Extended Market Index Fund, which tracks the Wilshire 4500 stock index. The I Fund (International Stock Index Investment Fund) is invested in the Barclays EAFE Index Fund, which tracks the Europe, Australasia, and Far East (EAFE) stock index. The S and I Funds were implemented in May 2001.

The monthly returns of the TSP Funds represent net earnings for the month after deduction of accrued administrative expenses, and in the case of the F, C, S, and I Funds, after deduction of trading costs and accrued investment management fees as well.The returns for the four indexes shown do not include any deduction for administrative expenses, trading costs, or investment management fees.

Future performance of the five funds will vary and may be significantly different from the returns shown here.