When I invest in the TSP, what am I investing in?
You may invest in any one or any combination of these funds, all of which are index-based:

• G Fund—investments in short-term, non-marketable U.S. Treasury securities that earn a rate fixed each month. Because the rate is calculated to equal the average market yield on outstanding marketable Treasury securities with four or more years to maturity, the securities earn a longer-term, higher rate.

• C Fund—large-capitalization U.S. stocks tracking the S&P 500 index, which provides a representative measure of stock market performance of 500 large companies traded in U.S. stock markets, primarily on the New York Stock Exchange.

• F Fund—a bond index fund consisting of a mix of government and corporate bonds.

• S Fund—small and mid-capitalization U.S. stocks tracking the Wilshire 4500 index of companies whose stocks are not in the S&P 500.

• I Fund—mostly large-capitalization stocks of companies in 22 foreign countries, mainly in Europe, Asia and the Far East.

• L Funds—mixes of investments in the other funds. There is an L Income fund for those currently making withdrawals or who expect to begin withdrawals relatively soon, and target withdrawal date funds for 2020, 2030, 2040, and 2050 designed for those who expect to begin withdrawals in the four years preceding or five years following those dates.

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