Will the Fed increase interest rates by 25 bps after the September 2026 meeting?
Crossbook compares what two exchanges, Polymarket and Kalshi, charge for the same event, and publishes a permanent scored record of its own forecasts under published rules.
Tracked on one venue, with Crossbook's own call on the record.
Bid/ask midpoint · retrieved 2026-09-15T23:55:28.358Z. Venue quote-update time is unavailable. Readings can be asynchronous.
88.5%bid 88.0% / ask 89.0%24h volume $4.0M · liquidity $1.1Mas of 15 Sept, 23:55 UTC · not refreshed recentlyView on PolymarketCrossbook forecast
Logged 9 Sept 2026, 19:41 UTC · Brier 0.9216
- The FOMC held rates at 3.50%-3.75% as of late July 2026, and there is no evidence of a tightening cycle underway heading into September.
- The June 2026 SEP median projection of 3.8% for end-2026 implies officials expected rates to be roughly unchanged from the current 3.75% upper bound through year-end, leaving little room for a September hike in the baseline.
- With the meeting on September 15-16 and only 6 days until resolution, any repricing toward a hike would likely already be visible in communications; no facts indicate hawkish momentum.
- Residual risk: an upside inflation surprise or hawkish pivot between late July and the meeting could produce a hike, but the SEP and the hold in July argue the modal outcomes are hold or cut, not hike.
What would change it: Evidence of a material upside inflation surprise or explicit Fed signaling of a hike between the July meeting and September 16 would sharply raise this estimate.
Settlement source-49.5 probability points from the market at generation · med confidence · Polymarket
Base rate: Most FOMC meetings result in no change to the target range, and a 25bp hike requires an active tightening bias, which occurs in well under a fifth of meetings historically.
Chosen by hand.
Settlement
Every answer this call has been given, oldest first. Nothing is edited: a correction is a new entry beside the one it replaces.
YESsettled 20 Sept 2026, 21:14 UTC · recorded 20 Sept 2026, 21:14 UTC · entered by handsettlement
What this call was reading
- The FOMC maintained the target federal funds rate range at 3.50% to 3.75%. as of 2026-07-29 · federalreserve.gov · within 90 days of this call
- The upper bound of the target federal funds rate was 3.75% effective July 30, 2026. as of 2026-07-30 · federalreserve.gov · within 90 days of this call
- The Federal Reserve’s June 2026 Summary of Economic Projections showed a median federal funds rate projection of 3.8% for the end of 2026. as of 2026-06-17 · federalreserve.gov · within 90 days of this call
- The FOMC scheduled its September 2026 meeting for September 15–16, 2026. as of 2026-08-28 · federalreserve.gov · within 90 days of this call
Context
Polymarket prices this at 88.5%. No verified equivalent is currently listed on the other venue, so there is no cross venue comparison on this page.
Volume over the last 24 hours is heavy, at about $3,982,382 on the busier venue.
This market has settled. The page is kept as a record of what the market said while the question was open, and of what Crossbook called.
Related markets
- Fed rate hike in 2026?
- Will the Fed increase interest rates by 25 bps after the October 2026 meeting?
- Will there be no change in Fed interest rates after the October 2026 meeting?
- Will there be no change in Fed interest rates after the September 2026 meeting?
- US recession by end of 2027?
- US recession by end of 2027?
Crossbook publishes every forecast it makes, timestamped before the answer is known and scored against the market afterwards. See the public record and the rules it is held to.
This call is line t-0189 of the public append-only ledger, committed when it was published. It appears on the record alongside every other call, resolved and open.