Polymarket$2.32BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$350.67MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$18.48MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.Compare OpenSea's first-day trading volume exceeding $1 billion prediction market odds side by side across Polymarket. Platforms show similar odds, with an average spread of just 0.0pp. Close agreement often signals strong market consensus. With $1.78M in combined trading volume across 1 outcomes, this is one of the most actively traded cross-platform prediction markets.
| Outcome | Polymarket | Spread |
|---|---|---|
 Yes | 18%+0.5 | - |
