TSP G Fund

$20.3253 share price on October 23, 2026+0.34% since the September 30, 2026 close

Index tracked

None: special-issue U.S. Treasury securities

Asset managers

Not applicable

Inception date

April 1, 1987

Risk (TSP rating)

Low

Total expense ratio (as of December 31, 2025)

0.034%

Assets (as of December 31, 2025)

$317.7 billion

Prices are TSP’s published share prices (the first row is the latest trading day in our data; the others are month-end closes). For every fund and every date, see TSP share price history.

G Fund (Government Securities Investment Fund). The G Fund’s investment objective is to ensure preservation of capital and generate returns above those of short-term U.S. Treasury securities.

The G Fund is invested in U.S. Treasury securities specially issued to the TSP. Payment of principal and interest is guaranteed by the U.S. government, so TSP says there is no credit risk. The securities earn a long-term interest rate but can be redeemed on any business day with no risk to principal: the value of G Fund securities does not fluctuate, only the interest rate changes.

The G Fund does not track an index: TSP lists its benchmark index and asset managers as Not applicable. Its interest rate is set monthly; see the G Fund rate page for the monthly rate history.

TSP rates the G Fund’s risk (potential for short-term loss) as Low. TSP says the value of G Fund securities does not fluctuate; only the interest rate changes. Payment of principal and interest is guaranteed by the U.S. government. TSP names one risk: inflation risk, the chance the investment will not grow enough to offset the loss of purchasing power from inflation.

The G Fund’s total expense ratio was 0.034% as of December 31, 2025: a net administrative expense ratio of 0.034% plus an investment expense ratio of 0.000%. That is $0.34 a year for every $1,000 invested. TSP publishes expense ratios once a year.

Through September 2026, TSP’s published average annual returns for the G Fund are 4.51% over 1 year, 4.50% over 3 years, 3.97% over 5 years, 2.97% over 10 years, 4.64% since its April 1, 1987 inception; the year-to-date return is 3.41%. Its best calendar year in TSP’s data is 1990 (8.90%) and its worst is 2020 (0.97%).

On the 10-year average annual return, the G Fund shows 2.97% against the C Fund’s 15.30% (higher). Past returns do not predict future results.

G Fund composition by holding (as of December 31, 2025)

TSP lists the whole fund as U.S. Treasury securities. TSP says the G Fund rate is the weighted average yield of approximately 202 U.S. Treasury securities on the last day of the previous month.

Averages are TSP’s annualized returns ending September 2026, net of fund expenses; the September 2026 column is that month’s return. Since inception counts from April 1, 1987.

Best calendar year: 1990 (8.90%). Worst: 2020 (0.97%).

Full history for every fund, with monthly returns, is on TSP rates of return.

Average annual returns through September 2026, as published by TSP. Funds that started on different dates cover different periods, and a blank means the fund has not existed that long.