Markets bet on whether CPI inflation will be above 3.1% for the year ending in September 2025

Kalshi has reported 4,207 in volume over the last 24 hours on their market for “Will the rate of CPI inflation be above 3.1% for the year ending in September 2025?”, making it one of the hottest markets on the platform today.

The market currently is implying a 26% chance for "Above 3.1%", which is neutral from yesterday, when the market implied a 26% probability.

If the Consumer Price Index (CPI) increases by more than 3.1% in the twelve months ending September 2025 (as represented by the one-decimal place value reported by the Bureau of Labor Statistics), then the market resolves to Yes.

In total, this market has seen a volume of 84,834 transactions since it was first opened on August 13, 2025. There are 54,870 positions of open interest in this market, and the overall liquidity is sitting at 20,186,508 contracts.

Based on Quiver’s tracking, here are 10 of the finance and politics markets that have had the most volume on Kalshi over the last 24 hours:

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