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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.
CHECK YOUR TSP BALANCE When you get a TSP loan, you are borrowing against your own contributions and whatever earning's they've accumulated. (You cannot borrow against your agency contributions.) In general, you can borrow any amount between $1,000 to $50,000, with the cap set at the amount of your contributions and earnings.