TSP close for Monday, Dec. 22, 2025

Most TSP funds finished higher on Monday, with small-cap stocks doing the heavy lifting. The only loser was the F Fund, and it barely moved.

Which funds rose or fell

S Fund: $103.0919, +1.16%. This was the standout and the only fund to gain more than 1% on the day. The S Fund tracks the Dow Jones U.S. Completion index, which covers mid-size and smaller companies outside the S&P 500. Its 5-day gain of 1.6% is the best of the group, so Monday extended a decent week for smaller names. Its year-to-date return is 14.04%.

C Fund: $110.0172, +0.65%. It follows the S&P 500, so a rise of this size is what you would expect when large U.S. stocks climb. The 5-day gain is 0.92% and the year-to-date return is 18.65%.

I Fund: $55.1054, +0.61%. It tracks the MSCI ACWI ex-US ex-China index, meaning international stocks outside China. It has the highest year-to-date return of any individual fund at 31.42%, though its 5-day gain is a modest 0.62%.

F Fund: $20.8545, -0.03%. The F Fund follows the Bloomberg U.S. Aggregate bond index. A dip this small is basically a rounding error, and it fits with Treasury yields edging up (more on that below). Its year-to-date return is 7.05%.

G Fund: $19.5677, +0.03%. As usual, it just earned its Treasury-based rate. It has no price swings, and its year-to-date return is 4.31%.

L Funds

The L Funds blend the five core funds, so they land between the bond-heavy and stock-heavy ends. L Income, the most conservative, gained 0.21%. L 2030 rose 0.42%, and the gains step up gradually through L 2050 at 0.58%. Everything from L 2055 through L 2075 rose 0.70%, which is what you would expect from portfolios that are nearly all stocks. Year-to-date, those longer-dated funds sit around 22%, versus 9.37% for L Income.

Notable move

The S Fund's 1.16% jump is the only daily move over 1%. Nothing fell anywhere close to that.

What moved IRA index funds and ETFs

One timing caution: the index and ETF numbers below are from the prior session's close, so they do not line up perfectly with the TSP figures above. They still show a similar pattern.

  • S&P 500: 6,878.49, up 0.64%
  • Dow Jones Industrial Average: 48,362.68, up 0.47%
  • Nasdaq Composite: 23,428.83, up 0.52%
  • Vanguard Total Stock Market ETF (VTI): $337.60, up 0.41%
  • Vanguard Total International Stock ETF (VXUS): $75.09, up 0.56%
  • Vanguard Total Bond Market ETF (BND): $74.02, down 0.03%

U.S. stocks and international stocks both rose, with international slightly ahead of the broad U.S. market fund. The 10-year Treasury yield ended at 4.169%, up 0.43% on the day. That works out to roughly 0.02 percentage points, and a small rise in yields is typically a slight headwind for bond prices. That matches BND's 0.03% dip and the F Fund's identical move. The data here does not include news headlines, so I will not guess at what drove the day beyond what the numbers show.

What it means for your plan

A good Monday is nice, but it is one day. The S Fund's 1.16% jump will look small on a chart a year from now, just as a bad day would. If you hold a L Fund or a broad index fund, your mix is already doing its job whether the day is up, down or flat. Contributions made on schedule matter far more than any single session's results.

This is general information, not personal advice. Your timeline, goals and comfort with risk are yours alone, so check with a qualified professional before making changes.