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Individual TSP Funds. 1  G Fund - Government Securities fund. The G Fund (think G for government securities) is invested in very short-term U.S. Treasury securities (bonds) guaranteed by the federal government. 2  F Fund - Fixed Income Index fund.
1 Keeping Your Money in the TSP. 2  If you want to keep your money in the TSP after you retire, you have three options: 3  A single lump sum withdrawal. 4  If you choose this option itâs important to remember that the money is pre-tax, so youâll need to be aware of the amount of taxes youâll get hit with.