TSP funds at the Friday close

The S Fund was the one real mover on Friday, January 23. It dropped 1.28% to $105.4681, the only fund to move more than 1% in either direction. Its 5-day change is -0.77%, and it is still up 3.74% for the year.

The I Fund went the other way, gaining 0.50% to $58.3726. That puts it up 1.2% over five days and 4.18% year to date, the best showing of any single TSP fund so far in 2026.

The C Fund barely moved, up 0.04% to $110.7141. It has slipped 0.39% over five days and sits 0.88% ahead for the year.

Bonds and the G Fund

The F Fund rose 0.08% to $20.9194. It is down 0.16% over five days and up 0.28% year to date. The F Fund follows the Bloomberg U.S. Aggregate index, which is mostly Treasuries, mortgage-backed securities and investment-grade corporate bonds. The 10-year Treasury yield was 4.239% at the prior session close, down 0.23%. Falling yields tend to lift bond prices, so a small gain fits.

The G Fund added 0.01% to $19.6409. It tracks a Treasury rate and has no price swings, so it only ever edges up. Its 5-day gain is 0.09% and its year-to-date gain is 0.25%.

L Funds

Every L Fund rose 0.03% on the day, except L Income at 0.02%. That is what a blend does: the S Fund's drop was cushioned by the I Fund's gain and by the steady G and F Funds. Five-day moves ranged from 0.09% to 0.11%.

Year-to-date, the longer-dated funds lead because they hold more stock. L 2055 through L 2075 are each up 2.38%, L 2050 is up 2.01%, and L 2030 is up 1.48%. L Income is up 0.85%.

What moved IRA index funds and ETFs

One caution first. The index and ETF figures below are from the prior session close, so they do not line up exactly with the TSP prices above.

  • S&P 500: 6915.61, up 0.03%. This is the benchmark for the C Fund, which was also nearly flat.
  • Dow Jones Industrial Average: 49098.711, down 0.58%. It was the weak spot among the major indexes.
  • Nasdaq Composite: 23501.24, up 0.28%.
  • Vanguard Total Stock Market ETF (VTI): $340.56, down 0.09%. The broad U.S. market was close to flat.
  • Vanguard Total International Stock ETF (VXUS): $79.53, up 0.57%. That matches the direction of the I Fund's 0.50% gain.
  • Vanguard Total Bond Market ETF (BND): $74.25, up 0.11%, helped by the lower 10-year yield.

The data supplied does not say what drove the S Fund's 1.28% decline, so I won't guess. Its benchmark, the Dow Jones U.S. Completion index, covers mid-sized and smaller U.S. companies. It is not the same as the Dow Jones Industrial Average, which holds 30 large companies. The two can move quite differently on the same day.

What it means for your plan

A 1.28% drop in one fund on one day is worth noticing, but it is not a reason to act. The S Fund is still up 3.74% this year, and the diversified L Funds barely registered the move. If you hold a mix of stock, bond and international funds, Friday showed why that mix exists: one piece fell while another rose.

For a long-term retirement plan, a single day rarely matters. What counts is your contribution rate, your overall allocation and how long you stay invested. This recap is general information, not personal advice, so check your own timeline and goals before changing anything.