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TSP Market Summary: Week of May 27, 2026

By Roy Weisert, PhD, CFP •

Key Takeaways

  • C, S and I funds all set record highs on May 26, then went flat on May 27 and bunched closer together.
  • TIPS recommends new mixes because the C fund returned 2.18% since May 6 and made six record highs versus two.
  • With the funds so close in ranking, leadership may keep shifting daily; hopes are for the bullish run to continue.

As discussed in last weeks update, the plan is to send out our TSP TIPS monthly investment mix after the market close on Wednesday 27 May, for reallocation before noon on Thursday 28 May. This allows us to fine-tune all three models second investment mix for May with a day to spare. On Monday the markets were closed, on Tuesday all three TSP individual funds (C/S/I) made new record highs, and Wednesday was a flatline. We were hoping to see one of the funds break out to the upside, but instead they became more tightly bunched. From a Performance Ranking (PR) perspective, all three are within about 0.5 of each other between 10.38 and 10.91. So how do we allocate when the PR leaderboard shifts daily? As mentioned above, on Tuesday, 26 May all three TSP individual funds (C/S/I) hit new record highs. The last time before that was on Thursday 6 May. And the C/S/I returns over that period were 2.184%, 0.913% and 0.910% respectively, with the last two almost identical. However, the C fund made six new record highs in that period, while both the S and I funds had only two on the start and end dates. As such we recommend the following new investment mixes and hopefully this bullish run will continue into June.

Recommended Allocation (Moderate Profile)

This is our historical recommendation from this date. For current recommendations, subscribe.

G FundF FundC FundS FundI Fund
0% 0% 51% 49% 0%
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