TSP Funds at the Close

It was a red day for nearly every TSP fund on Thursday, March 26, 2026. The one exception was the G Fund, which edged up 0.01% to $19.7809 and is up 0.96% for the year. That is what you expect from a fund that tracks a Treasury rate and holds no stock or bond price risk.

The stock funds took the hits:

  • C Fund fell 1.74% to $103.9264. It tracks the S&P 500, which dropped 1.74% as well, so the match is exact. The C Fund is down 5.3% year to date, the weakest of the individual funds.
  • S Fund fell 1.55% to $98.8383. It follows the Dow Jones U.S. Completion index, meaning mid-sized and smaller companies. Its 5-day loss is only 0.54%, so most of that decline came in this one session. It is down 2.78% for the year.
  • I Fund fell 2.09% to $55.8537, the biggest one-day drop of the group. It follows international stocks outside the U.S. and China. Its 5-day loss is 1.66%, and it is down 0.31% for the year, the smallest year-to-date loss among the stock funds.
  • F Fund fell 0.59% to $20.7406. It tracks the Bloomberg U.S. Aggregate bond index. Bond prices slid as yields rose (more on that below). It is down 0.57% year to date.

Moves Over 1%

Four of the individual funds moved more than 1%: the I Fund (-2.09%), the C Fund (-1.74%), the S Fund (-1.55%), and, among the lifecycle funds, most of the L lineup. The F Fund and L Income stayed under that line.

L Funds: The Blend at Work

The L Funds mix the five core funds, so their results line up with how much stock each one holds. L Income fell 0.53%, with a bigger share in G and F. L 2030 dropped 1.08%. L 2040 fell 1.36% and L 2050 fell 1.54%. The longest-dated funds, L 2055 through L 2075, all fell 1.82%, with a year-to-date loss of 3.17%. They hold the most stock, so they felt the most of the C and I Fund declines.

What Moved IRA Index Funds and ETFs

The broad market data tells the same story. The index figures below are listed as the prior session close, though the S&P 500 move matches the C Fund's exactly.

  • S&P 500: 6,477.16, down 1.74%
  • Dow Jones Industrial Average: 45,960.11, down 1.01%
  • Nasdaq Composite: 21,408.08, down 2.38%

The Nasdaq fell the most and the Dow the least, so the pressure was heaviest on the growth-heavy end of the market. The Vanguard Total Stock Market ETF (VTI) fell 1.72% to $319.55, in line with the S&P 500. The Vanguard Total International Stock ETF (VXUS) dropped 2.44% to $75.20, the largest decline of the group and consistent with the I Fund's slide.

On the bond side, the Vanguard Total Bond Market ETF (BND) slipped 0.58% to $73.11. The 10-year Treasury yield rose 2.03% to 4.416%, an increase of roughly 9 basis points. Bond prices and yields move in opposite directions, which explains why both BND and the F Fund lost ground. The F Fund's 0.59% decline is nearly identical to BND's.

What It Means for Your Plan

A 1.7% drop in the S&P 500 looks sharp on screen, but a single session rarely changes the outcome of a plan built over decades. The 5-day numbers are a useful reminder: the C Fund is down 1.95% over the week, and the S Fund only 0.54%. Daily moves can look larger than they feel over a longer stretch.

Today also showed why diversification exists. Stocks and bonds both fell, but the G Fund stayed flat and the blended L Funds lost less than the pure stock funds. That is the design working as intended, not a sign that something is broken.

This recap is general information, not advice for your situation. Your allocation, time horizon and goals matter far more than one Thursday's close.