Fed Decision Market Watch · September 17, 2026 · checked 19:03 UTC

October event-contract odds move closer again

Answer. At 19:03 UTC, direct October pages still put no change first, but only narrowly. Kalshi displayed 52% for “Fed maintains rate” and 47% for “Hike 25bps.” Polymarket displayed 52% for no change and 49% for a 25 bp increase. Since the matched 13:34 UTC checks, the named no-change rows fell 3 and 2 percentage points and the named hike rows each rose 2. These are separate venue-specific event contracts, not a consensus or a futures-implied estimate.

Like-for-like movement on the same pages

Direct page	13:34 UTC	19:03 UTC	Named-row change
Kalshi October	55% maintain rate; 45% Hike 25bps	52% maintain rate; 47% Hike 25bps	Maintain rate −3 percentage points; Hike 25bps +2 points
Polymarket October	54% no change; 47% 25 bp increase	52% no change; 49% 25 bp increase	No change −2 percentage points; 25 bp increase +2 points

Each comparison uses the same named direct page at two pool access times. The values were not taken from a cross-venue aggregator. No separate reliable quote time appeared on either page, so the table records access time.

What remains outside the headline

Kalshi also displayed 2% for “Hike >25bps” and hid two further outcomes. Polymarket displayed smaller rounded outcome rows beside the two leading rows. The pool does not add them, infer residuals, or portray either page as a complete distribution.

Next official testable dates

Official calendars list August JOLTS on September 29 at 10:00 ET, August Personal Income and Outlays on September 30 at 08:30 ET, September-meeting minutes on October 7 at 14:00 ET, and September CPI on October 14 at 08:30 ET. The October 27–28 FOMC meeting ends with the official statement on October 28. These dates tell readers when new official information arrives; they do not explain this afternoon’s contract movement.

What did not become comparable

CME FedWatch describes its tool as probabilities implied by 30-Day Fed Funds futures prices. Its live October grid remained unreadable in this check. The pool therefore does not insert a third-party CME figure or calculate a spread against the two event contracts.

Limits. A narrowed gap is not a trader census, an inevitable policy result, a causal story, or a portfolio instruction. The official September decision remains a separate record: the FOMC raised the target range by 25 bp to 3.75%–4.00% in a 12–0 vote.