Polymarket shows 63% odds Fed holds rates steady in September
Polymarket traders now assign a 63% probability that the Federal Reserve will hold rates steady in September, with more than $20.3 million traded on the contract. Kalshi prices the same outcome slightly higher at 65%. CME's FedWatch monitor shows a narrower 55.6% chance of no change. The repricing follows the latest jobs data release. The gap between the prediction-market platforms and traditional futures markets highlights how event-contract venues are functioning as real-time gauges of monetary-policy sentiment.
The eight-point spread between Kalshi and CME FedWatch is the new signal to track. For traders, it exposes whether prediction markets are pricing genuine macro disagreement or just liquidity differences against deeper futures books. The $20.3 million in Polymarket volume suggests enough flow to resist whale-driven jumps, but neither platform publishes fillable depth or post-trade volume — so the spread itself remains unactionable.
Institutional desks routing hedges from CME futures need verifiable execution data; without it, these prices function as sentiment gauges, not tradable rates. The platform that first releases real market-structure metrics will capture capital currently staying in traditional futures. Both venues are competing for that credibility.