The short version

Thursday was a down day for stocks and a quiet, slightly positive one for bonds. The S Fund took the biggest hit at -1.95%, the C Fund dropped 1.56%, and the F Fund rose 0.47%. The G Fund did what it always does and edged up 0.01%.

TSP funds: what rose, what fell

C Fund ($109.4404): -1.56%. It follows the S&P 500, which fell 1.57% in the index data I have. Those two numbers line up almost exactly, as they should. The C Fund is now at -0.28% for the year, though it is still up 0.54% over five days.

S Fund ($102.8022): -1.95%. This is the day's weakest fund. It tracks the Dow Jones U.S. Completion index, meaning mid-sized and smaller companies outside the S&P 500. It fell more than the C Fund, so the weakness was broad. Even so, it's up 1.63% over five days and 1.12% for the year.

I Fund ($60.6995): -0.65%. International stocks fell, but less than U.S. shares. The fund tracks MSCI ACWI ex-US ex-China. Its five-day gain of 3.78% is the largest of any core fund this week, and its 8.34% year-to-date return leads the group by a wide margin.

F Fund ($21.1193): +0.47%. It follows the Bloomberg U.S. Aggregate bond index. Bond prices rose as the 10-year Treasury yield slipped, which is the usual seesaw. It's up 1.24% for the year.

G Fund ($19.6871): +0.01%. It earns a Treasury-based rate and doesn't swing with markets. It's up 0.48% year to date.

The L Funds

The L Funds are blends of the five core funds, so their losses scaled with how much stock each one holds. L Income, the most conservative, lost 0.32%. L 2030 fell 0.71%, L 2040 fell 0.89%, and L 2050 fell 1.02%. L 2055 dropped 1.28%, and L 2060 through L 2075 each fell 1.27%. Those longer-dated funds all hold nearly the same stock-heavy mix, which is why their numbers are so close.

Moves over 1%

Four things crossed that line on the day: the S Fund (-1.95%), the C Fund (-1.56%), L 2050 (-1.02%), and the group of L 2055 through L 2075 (about -1.27% to -1.28%). One more number stands out in the other direction: the I Fund's 3.78% gain over five days.

What moved IRA index funds and ETFs

The index figures I have are labeled as the prior session close, and they tell the same story as the TSP funds.

  • S&P 500: 6,832.76, down 1.57%.
  • Dow Jones Industrial Average: 49,451.98, down 1.34%.
  • Nasdaq Composite: 22,597.15, down 2.04%. It fell the most of the three, so the weakness leaned toward growth and tech-heavy names.
  • Vanguard Total Stock Market ETF (VTI): $336.01, down 1.60%.
  • Vanguard Total International Stock ETF (VXUS): $82.13, down 1.04%. It tracks a different, broader index than the TSP I Fund, so the numbers won't match exactly.
  • Vanguard Total Bond Market ETF (BND): $74.66, up 0.46%.
  • 10-Year Treasury yield: 4.104%, down 1.63% on the day. That's a move of roughly 7 basis points. Falling yields lifted bond prices, which fits BND's gain and the F Fund's.

What it means for your plan

A 1.5% to 2% drop in stocks looks sharp in the moment, but it's a normal-sized move over a long career of saving. Notice the cushion on the page: the C Fund is only slightly negative for 2026, and the I Fund is well ahead. The bond and G funds did their usual job of holding steady while stocks slid.

One day rarely matters for a long-term plan. If your allocation matched your timeline and your comfort with risk yesterday morning, it still does. This recap is general information, not personal advice.