Polymarket$2.87BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$354.88MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$23.03MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.Compare Federal Reserve Interest Rate Decision prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 0.1pp. Close agreement often signals strong market consensus. With $2.30M in combined trading volume across 5 outcomes, this is one of the most actively traded cross-platform prediction markets.
| Outcome | Polymarket | Kalshi | Spread |
|---|---|---|---|
F Fed maintains rate | - | 99%±0 | - |
H Hike 25bps | - | 1%±0 | - |
C |
| - |
1%±0 |
| - |
N No | - | 1%±0 | - |
 Yes | 0%±0 | 1%±0 | 0.6pp spread |
