The TSP’s F Fund gained 2.47% in October as bond yields eased, while the C, S, and I Funds all slipped after a one-day selloff on October 30.
| Fund | October | Year to date | 12 months |
| G Fund | +0.46% | +3.89% | +4.6% |
| F Fund | +2.47% | -0.35% | 0.0% |
| C Fund | -0.87% | +11.75% | +12.1% |
| S Fund | -0.40% | +11.17% | +10.1% |
| I Fund | -2.89% | +13.09% | +17.0% |
Returns run through the October 30 close, the last trading day of the month. See each fund’s official returns on TSP.gov.
Bonds Rebounded as Yields eased
October reversed September, when the G Fund was the only fund to gain. Bond prices rise when interest rates fall, and long-term Treasury yields eased through much of October after reaching multi-decade highs. That lifted the F Fund, which recovered almost all of September’s 2.59% loss and is now down just 0.35% for 2026. The G Fund added 0.46%.
One Bad Friday Changed the Month
Through the October 29 close, the C Fund was up about 1% for the month. Then on October 30, a technology-led selloff pushed the C Fund down 1.81%, the S Fund down 2.08%, and the I Fund down 1.51% in a single session, turning a modest gain into a 0.87% monthly loss.
The backdrop was tense. The Federal Reserve held rates steady on October 28, but two of its members voted to raise them, and markets put the odds of a December rate hike at about 85%.
The I Fund Still Leads
The I Fund fell 2.89% after losing 2.30% in September, its second weak month in a row. It still leads all five funds for 2026 at +13.09%, but its lead over the C Fund has narrowed from 3.72 percentage points at the end of September to 1.34.
The L Funds Followed Their Mix
L Income, which is mostly G and F Fund money, was flat at +0.02%. L 2030 fell 0.45%, L 2050 fell 1.01%, and L 2055 through L 2075 each lost 1.48%. The longest-dated funds are still up more than 12% for the year, and L Income is up 6.06%.
Reading One Month
A monthly total shows the result but not the path, and October is a reminder that a single day can change it and that stock and bond funds can move in opposite directions. A Federal Retirement Consultant (FRC®) can look at your TSP allocations and make sure they fit your needs and goals.
