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 Serie A League Winner prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 1.2pp. Close agreement often signals strong market consensus. With $33.9K in combined trading volume across 20 outcomes, this is one of the notable cross-platform prediction markets.
JuventusPolymarketKalshiCost: 96¢ per pair → pays $1 at resolution. Gross spread 4.0pp before fees.
View all arbs| Outcome | Polymarket | Kalshi | Spread |
|---|---|---|---|
Inter | 91%— | 90%+1.0 | 0.5pp spread |
AC Milan | 7%±0 | 7% |
| 0.2pp spread |
Napoli | 2%— | 4%-1.0 | 1.9pp spread |
Juventus | 0%+0.5 | 4%±0 | 4.0pp spread |
Bologna | 0%±0 | 3%±0 | 2.9pp spread |
Atalanta | 0%— | 1%±0 | 0.9pp spread |
Como | 0%— | 1%±0 | 0.9pp spread |
Roma | 0%±0 | 1%±0 | 0.9pp spread |
Lazio | 0%±0 | 1%±0 | 1.0pp spread |
Cremonese | 0%— | 1%±0 | 1.0pp spread |
Fiorentina | 0%— | 1%±0 | 1.0pp spread |
Genoa | 0%— | 1%±0 | 1.0pp spread |
Udinese | 0%— | 1%±0 | 1.0pp spread |
Lecce | 0%— | 1%±0 | 1.0pp spread |
H Hellas Verona | 0%— | 1%±0 | 1.0pp spread |
P Parma Calcio | 0%— | 1%±0 | 1.0pp spread |
Pisa | 0%— | 1%±0 | 1.0pp spread |
Sassuolo | 0%— | 1%±0 | 1.0pp spread |
Torino | 0%— | 1%±0 | 1.0pp spread |
Cagliari | 0%— | 0%— | - |
