C Fund
Common Stock Index
Invests in large U.S. company stocks. Historically the highest long-term growth fund in TSP.
Tracks: S&P 500 Index
S Fund
Small Cap Stock Index
Invests in small and mid-sized U.S. companies not in the S&P 500. Higher volatility, higher growth potential.
Tracks: DJ U.S. Completion TSM Index
I Fund
International Stock Index
Invests in international stocks from developed markets in Europe, Asia, and beyond.
Tracks: MSCI EAFE Index
F Fund
Fixed Income Index
Invests in U.S. government, corporate, and mortgage-backed bonds. Lower risk, steady income.
Tracks: Bloomberg U.S. Aggregate Bond Index
G Fund
Government Securities
Invests in special U.S. Treasury securities. Principal is guaranteed — no risk of losing money.
Rate: ~4.5% annualized (2026)
How often do TSP prices update?
Official TSP share prices are published by TSP once per day after the market closes. During market hours, this tracker applies live ETF proxy movements to the latest official TSP close to estimate the current price in real time.
Why might these prices differ slightly from TSP.gov?
After market close, prices shown here match the official TSP share prices published on TSP.gov. During the trading day, prices are estimated by applying real-time ETF movements to the last official close — a close but not exact approximation.
What is YTD return?
YTD (Year-to-Date) return shows how much the fund has gained or lost since January 1st of the current year, calculated using official TSP share prices sourced directly from TSP.gov.
Which TSP fund has performed best?
Historically the C Fund has delivered the highest long-term returns, followed by the S Fund. Short-term performance varies significantly. Apex Equity's TSP strategies use backtested seasonal patterns to guide allocation decisions.
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Our data-driven TSP strategies use backtested seasonal patterns to signal the optimal times to shift between C, S, I, F, and G funds. Join federal employees and military members already using Apex Equity.