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FollowingThe three most-watched forecast markets-Polymarket, Kalshi and Myriad-agree that the probability of the Fed leaving interest rates unchanged in September is about 74% to 75%. This rare cross-platform consistency suggests traders generally expect the Fed to sit tight at its next meeting.
Highlights
Polymarket, Kalshi and Myriad each priced the Fed's inaction in September at about 74% to 75%.
The consistency of the three independent platforms strengthens the credibility of the signal and transcends the limitations of a single market reading.
This figure is an implied probability in the market, not a certainty. As new data is released, the probability may be adjusted.
What are Polymarket, Kalshi and Myriad pricing?
The core signal is consistency. It was not that one market had an abnormal reading, but that all three markets were in the 74% to 75% range on whether the Fed would keep interest rates unchanged. When separate order books point to the same number, it is difficult to attribute it to lack of liquidity or a single large forehead. Myriad's markets on September interest rates reflected the same tendency to sit tight. This number is a probability, not a final conclusion. A reading of 74% to 75% still means there is about a one-in-four chance of a different outcome, so the market describes preference scenarios rather than certainty. Traders who follow these platforms are also more active on neighboring policy issues.
Why traders tend to sit tight in September
Positions point to expectations of unchanged interest rates rather than interest rate cuts or interest rates. The logic of holding back often reflects the view that policymakers need more confirmation signals before adjusting policies. Analysts at Goldman Sachs believe the Fed is unlikely to raise interest rates in September.
The hold on scenario and its main risks
The main risk of the hold on scenario is that new data will be unexpected, forcing the Fed to turn to interest rates or interest rates. Since probability reflects the current trader's position, probability can change quickly once the risk becomes true. The time itself is fixed: the Fed's meeting schedule has been announced, providing traders with a clear pricing deadline. The growing interest in these contracts coincides with the industry's broader involvement in the field.
What factors may change the probability before the September decision
predicts that the market is dynamic and will be re-priced as new information arrives. Upcoming inflation data, labor data and the Fed's stance may affect interest rate expectations before the meeting. Focus on this probability cluster itself. Leaving the 74% to 75% range, no matter which direction you move, will signal that trader confidence is shifting; the differences between the three platforms will themselves become part of the story rather than a footnote. For now, the consensus is just a snapshot. The three platforms reached an agreement today, but the reading is a real-time probability that will be updated until the Fed actually makes a decision.
