Thursday's TSP close

Every TSP fund finished higher on Thursday, though the G Fund barely registered. The C Fund led the individual funds with a 1.14% gain to $123.2092. The I Fund rose 1.00% to $65.4441, the S Fund added 0.89% to $114.1084, and the F Fund gained 0.50% to $20.6910. The G Fund edged up 0.01% to $20.2209, which is what it does.

The C Fund's move matches its benchmark. The S&P 500 gained 1.14%, and the C Fund simply follows that index. The S Fund tracks the Dow Jones U.S. Completion index, which covers mid-sized and smaller companies, and its 0.89% gain was a bit softer than the large-company move. The I Fund follows MSCI ACWI ex-US ex-China, and its 1.00% gain sat right at the line.

Moves worth flagging

Only the C Fund topped 1% outright. The I Fund landed at exactly 1.00%. The L 2055 through L 2070 funds also gained 1.05%, and L 2075 matched them. Those funds hold the most stock, so they ran close to the C Fund's pace.

Over five days the picture is quieter. The C Fund is up 0.64%, while the S Fund is up only 0.12%. The I Fund is the one fund still down over that stretch, at -0.28%, so Thursday's gain was partly a bounce. For the year, the I Fund leads at 16.8%, followed by the C Fund at 12.27% and the S Fund at 12.24%. The F Fund is the only fund below zero year to date, at -0.81%.

L Funds

L Funds blend the individual funds, so their daily results rank by stock exposure. L Income gained 0.33%, L 2030 gained 0.61%, L 2040 gained 0.80%, and L 2050 gained 0.90%. The longest-dated funds, L 2055 and later, rose 1.05% with year-to-date gains of about 13.8%. L Income is up 6.01% for the year.

What moved IRA index funds and ETFs

The index figures I have are labeled as the prior session close. The S&P 500's 1.14% gain lines up exactly with the C Fund, so they appear to describe the same move. The S&P closed at 7,637.76. The Nasdaq Composite did the heavy lifting, up 1.69% to 26,418.301, while the Dow gained a smaller 0.61% to 51,778.039. That gap suggests growth-oriented stocks led, though the data here doesn't say what sparked the buying.

The ETFs followed. VTI, the Vanguard Total Stock Market ETF, rose 1.10% to $375.34. VXUS, the total international fund, gained 1.28% to $86.50, outpacing U.S. stocks on the day. BND, the Vanguard Total Bond Market ETF, rose 0.51% to $71.47.

Bonds had help from rates. The 10-year Treasury yield fell 1.18% to 4.947%. Bond prices rise when yields fall, which explains why BND gained 0.51% and the F Fund gained 0.50%. Those two track similar benchmarks and moved almost in step. The G Fund doesn't swing with market prices, so it was flat.

What it means for your plan

One good day is pleasant, but it is a small part of a long record. The C Fund's 0.64% five-day gain and the I Fund's slightly negative week show how quickly short stretches can shift. The year-to-date numbers say more than any single session.

If you hold a mix of stock, bond and G Fund money, or a single L Fund, Thursday's results were mostly a reminder that diversification works as designed: stocks rose, bonds rose less, and the G Fund held steady. This recap is general information, not personal advice. Your allocation should reflect your timeline and your tolerance for swings, not one morning's headlines.