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Actual TSP fund day change Price date Sep 16, 2026 · loaded Sep 16, 2026 8:09 PM CDT

Mode: Actual TSP fund prices. Day changes use consecutive rows from our share-price history (source: tsp.gov daily valuations as stored in our database). Official TSP share prices typically post around 8:00 PM CDT on trading days. Comparing Sep 16, 2026 vs prior post Sep 15, 2026.

Fund Tracks / index Share price Prior price Day change
F · F Fund
Fixed Income Index Investment Fund
Bloomberg U.S. Aggregate Bond Index 20.5873 20.5933 -0.03%
C · C Fund
Common Stock Index Investment Fund
S&P 500 Index 121.8196 122.3618 -0.44%
S · S Fund
Small Cap Stock Index Investment Fund
Dow Jones U.S. Completion Total Stock Market Index 113.1040 113.4990 -0.35%
I · I Fund
International Stock Index Investment Fund
International equities (historically MSCI EAFE; broader ex-U.S. indexes may apply) 64.7938 64.7795 +0.02%

Share prices and day changes above are from official TSP fund valuations as stored for the price dates shown. Values can differ from a live tsp.gov session until our database has refreshed (typical post ~8:00 PM CDT on trading days).

Current allocations
Monthly allocation

Multivariable Calculus

Allocation percentages for September 2025
F Fund 0%
C Fund 56%
S Fund 0%
I Fund 44%

Welcome to September and Happy Labor Day! We had a great month with all funds positive, with the S and I Funds leading the way.  Unfortunately, while my TSP Coach returns are still solid for the year, up over 8% through August, we are behind all the indices.  I’ll admit that this is an off year for TSP Coach.  It is incredibly difficult to understand all the dynamics in the market when all the variables are changing at the same time.  The I Fund has had a year like no other since 2006 when compared to the other funds (massive returns and beating C and S Funds). The C and the S Funds are moving along at a pretty average pace compared to previous years with an average of 1–1.2% per month.  I cannot and do not seek to time the market, but this year, timing has hurt.  I cannot be disappointed with an 8% return by August as I have mitigated my risk, maybe a bit too much, and I will continue to be careful in my allocation decisions—too many variables are still at work.

I’m watching 3 major areas for the next 3 months.

First, Federal Reserve interest rate cuts.  Most of you have probably seen the news about President Trump's attempted firing of Lisa Cook, which she is challenging, potentially opening up a position for another Trump-appointed governor.  Many think he will stack the deck with someone that will cut interest rates.  Maybe he will, but a nomination and their impact will not affect rates in the coming months.  However, I think the argument has been made that with an adjustment of standard inflation rates to 2.5%, a weak but positive job market, and high home interest rates, the Fed will cut rates in September.  This is probably already priced into the markets and thus could actually have a negative effect on the C and I Funds.  However, these bumps in either direction are likely short-lived (2 weeks) and other factors will take over.  Look for this news September 16-17 and impacts to be seen the rest of the month.

Second, I’m watching the tariffs, as always.  I do not think we are going to see the full 0.5% GDP haircut.  As more nations come to the table and negotiate deals, lowering their tariffs in exchange for investment in the US, the offsets will start to be realized.  We are 4 months into the tariff war and prices have not gone haywire.  Additionally, they have been staggered and companies are realizing they have to cut their prices to still remain competitive in the US if they have to pay the tariff, so consumer prices have remained flat (not counting normal inflation impacts of course).  I see a return to normal by the beginning of next year as the tariff dust settles and with that more certainty in the market.

Finally, I’m closely watching the Chinese economy and its political situation.  Lots of information is coming out about its poor economy and President Xi’s remaining political future.  An unsettled China can have so many impacts across so many areas it is hard to quantify.  Although they aren’t a major consumer of US manufactured goods, many US companies derive a significant portion of their income from sales in the Chinese market. However, counterfeit Chinese goods, a significant strain on US businesses, could be reduced, giving smaller companies more breathing room and trade space.  Finally, if Xi is replaced, the direction that China and the CCP wish to head could make the world a lot more or less interesting, if you read between the lines.  I recommend everyone take a look at the China Show and the China Observer for some quick updates.

I’m still strong on the US economy and with a rate cut potentially already priced in for both the US and I Funds, I’m staying close to where I have been.  The I Fund still benefits from lower interest rates in Europe and elsewhere.  Keep investing!

Last 12 month TSP returns

TSP fund quotes

Latest stored share prices for context with this post. Scroll sideways on small screens.

Date L Income L 2030 L 2035 L 2040 L 2045 L 2050 L 2055 L 2060 L 2065 L 2070 L 2075 G Fund F Fund C Fund S Fund I Fund
2026-09-16 30.9516 63.1152 19.3938 74.7409 20.7723 46.2304 24.2845 24.2811 24.2775 14.3884 12.5683 20.2182 20.5873 121.8196 113.1040 64.7938
2026-09-15 30.9724 63.2041 19.4277 74.8841 20.8151 46.3321 24.3491 24.3457 24.3422 14.4267 12.6018 20.2155 20.5933 122.3618 113.4990 64.7795
Daily Change -0.07%-0.14%-0.17%-0.19%-0.21%-0.22%-0.27%-0.27%-0.27%-0.27%-0.27%0.01%-0.03%-0.44%-0.35%0.02%
Month to Date -0.47%-1.04%-1.31%-1.44%-1.56%-1.66%-1.94%-1.95%-1.95%-1.95%-1.95%0.22%-1.25%-1.67%-2.98%-2.03%
Year to Date 5.84%8.64%9.7%10.26%10.75%11.26%13.32%13.32%13.32%13.31%13.31%3.22%-1.41%11.24%12.64%16.76%
Details L Income L 2030 L 2035 L 2040 L 2045 L 2050 L 2055 L 2060 L 2065 L 2070 L 2075 G Fund F Fund C Fund S Fund I Fund

Allocation history

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