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 Arsenal FC vs. Everton FC prediction market odds side by side across Polymarket, Kalshi. Platforms currently disagree by an average of 25.0pp, with the largest spread reaching 99.0pp. These price differences can signal arbitrage opportunities or reflect different trader sentiment. With $10.34M in combined trading volume across 4 outcomes, this is one of the most actively traded cross-platform prediction markets.
Draw (Arsenal FC vs. Everton FC)PolymarketKalshiCost: 1¢ per pair → pays $1 at resolution. Gross spread 99.0pp before fees.
View all arbs| Outcome | Polymarket | Kalshi | Spread |
|---|---|---|---|
Arsenal FC | 100%— | - | - |
Draw (Arsenal FC vs. Everton FC) | 0%— | 99%±0 |
Everton FC | - | 1%±0 | - |
Draw (Arsenal FC vs. Everton FC) | 0%— | 1%±0 | 0.9pp spread |
