Polymarket$3.08BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$380.07MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$24.19MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.Compare Howard Bison vs. UMBC Retrievers Basketball Game prediction market odds side by side across Kalshi, Polymarket. Platforms show similar odds, with an average spread of just 0.0pp. Close agreement often signals strong market consensus. With $9.54M in combined trading volume across 3 outcomes, this is one of the most actively traded cross-platform prediction markets.
| Outcome | Kalshi | Polymarket | Spread |
|---|---|---|---|
 Yes | - | 100%— | - |
H Howard | 99%+50.0 | - | - |
U |
1%-52.0 |
| - |
| - |
