October Fed decision odds: no-change market holds 85.5% as the Oct 28 meeting closes in

The October 28 Federal Reserve decision is now a week out, and event markets have settled into a view that has barely moved all autumn. Polymarket prices no change in the federal funds rate at 85.5% as of October 20, against a 14.5% probability of a 25 basis point hike, a 0.4% chance of a quarter point cut, and a 0.4% implied probability of a 50 basis point or larger increase. Those contracts resolve the day after the Federal Open Market Committee's two day meeting concludes, so the market's assignment is effectively a near one sided thesis that the Fed holds at the current target range of 3.75% to 4.00% for an eighth straight session.

What is worth watching this week is not the base case, which has been stable, but the edges. The no-change contract has eased a few points from where it sat in the days after the September consumer price index reading, when our desk tracked it near 88%. The hike leg has drifted up to fill the gap. The shift is small and the favorite is still the overwhelming outcome, but the direction of that drift is a real signal: traders are not pricing October tightening, they are pricing the growing conviction that a hike is coming, just not at this meeting.

Related reading: RBI Rate Odds Rise as October Decision Nears: Hike at 78%.

The futures strip agrees, with a twist that matters for anyone reading venue divergences. A FedWatch style methodology snapshot on October 20 put October 28 at 84% for a hold and 16% for a 25 basis point increase, a rounding away from Polymarket's 85.5% and 14.5%. That near convergence between a permissionless venue and the institutional fed funds futures market is the quiet headline of the week. For much of this cycle the two venues have drifted apart on Fed questions, usually because Polymarket runs a few points hotter on the benchmark side. Here they are a point and a half apart, which tells you the October outcome is not in dispute.

The December question is where the two venues still disagree, and it is the reason the October meeting matters beyond itself. Our desk's October 19 brief put the December hike across the 83.5% level with the two year Treasury backing the move. Polymarket prices a December hike along similar lines, but the futures complex is more aggressive, pricing roughly a full quarter point of tightening by the end of the year. The spread is not an October story; it is a statement about the path. A hold on October 28 keeps the December contract live and underpins the case that the next move is up.

Related reading: Kalshi's December Ladder Puts a Second Fed Hike at 42 Percent.

On the primary side there is little scheduled in the next two days that would move these odds. The decision itself dominates the calendar. Two senior Fed officials have signaled comfort with holding, which matches the market's base case, and neither has suggested urgency to move in October. The communication pattern in the run up to this meeting is consistent with a market that has already priced a pause: commentary has been about the December decision and the 2027 path, not about next week.

The risk skew is asymmetric. Because the no-change contract sits near 85.5%, the de-risking that typically arrives in the final week before a decision is slower to show up on that side. Money that wants to express a view is gravitating to the hike leg, where a 14.5% contract offers a wider payoff if officials surprise. That is a structural feature of event markets, not a commentary on likelihood. What the 85.5% number says is that the market treats the hold as close to locked in, and it would take a material data shock in the next seven days to move it.

For prediction market users the venue comparison is the most useful read this week precisely because it is quiet. When Polymarket and the fed funds futures point at the same number, the event is fully priced and the low liquidity on the outer contracts reflects that. The 0.4% prints on the cut and the 50 basis point move are not real probabilities being bid; they are the noise floor of a market that settled days ago. Traders who scan those tails for mispricings will find little because the crowd has already compressed them.

The Outlook For the policy path, the October 28 print is a checkpoint rather than a pivot. A hold keeps the focus on December, where the strip already prices tightening, and on the 2.00-ish percent level implied for the fed funds rate through 2027 in the far dated Kalshi contracts we have been tracking. If the committee holds and signals patience, the no-change venue stays heavy into December, and only the December roll becomes the next battleground. If officials instead lay groundwork for a move, the drift we have seen this week accelerates. Either way the October market has told us its answer: the Fed is not changing course next week, and the real contest begins after.

This content is for informational purposes only and does not constitute financial advice. Past performance is not indicative of future results. Consult a qualified financial advisor before making investment decisions.