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 2026 NBA Champion prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 0.9pp. Close agreement often signals strong market consensus. With $3.59M in combined trading volume across 30 outcomes, this is one of the most actively traded cross-platform prediction markets.
Boston CelticsPolymarketKalshiCost: 97¢ per pair → pays $1 at resolution. Gross spread 3.1pp before fees.
View all arbs| Outcome | Polymarket | Kalshi | Spread |
|---|---|---|---|
Oklahoma City Thunder | 39%— | 39%±0 | 0.5pp spread |
San Antonio Spurs | 13%±0 |
| 2.9pp spread |
Boston Celtics | 12%±0 | 15%±0 | 3.1pp spread |
Denver Nuggets | 9%— | 9%±0 | 0.5pp spread |
Cleveland Cavaliers | 5%-0.7 | 6%-1.0 | 0.9pp spread |
New York Knicks | 5%±0 | 6%+1.0 | 1.5pp spread |
Detroit Pistons | 5%±0 | 4%-1.0 | 1.2pp spread |
Minnesota Timberwolves | 2%±0 | 4%+1.0 | 1.9pp spread |
Los Angeles Lakers | 3%— | 3%±0 | 0.3pp spread |
Houston Rockets | 2%±0 | 1%-1.0 | 1.1pp spread |
Los Angeles Clippers | 2%±0 | 1%-1.0 | 0.8pp spread |
Miami Heat | 1%— | 1%±0 | 0.1pp spread |
Toronto Raptors | 1%±0 | 1%±0 | 0.3pp spread |
Charlotte Hornets | 1%±0 | 1%±0 | 0.3pp spread |
Orlando Magic | 1%±0 | 1%±0 | 0.4pp spread |
Golden State Warriors | 1%— | 1%±0 | 0.4pp spread |
Phoenix Suns | 1%— | 1%±0 | 0.4pp spread |
Philadelphia 76ers | 1%±0 | 1%±0 | 0.5pp spread |
Atlanta Hawks | 1%— | 1%±0 | 0.5pp spread |
Portland Trail Blazers | 0%— | 1%±0 | 0.7pp spread |
New Orleans Pelicans | 0%— | 1%±0 | 0.9pp spread |
Memphis Grizzlies | 0%— | 1%±0 | 0.9pp spread |
Chicago Bulls | 0%— | 1%±0 | 0.9pp spread |
Utah Jazz | 0%— | 1%±0 | 0.9pp spread |
Milwaukee Bucks | 0%— | 1%±0 | 0.9pp spread |
Dallas Mavericks | 0%±0 | 1%±0 | 0.9pp spread |
Brooklyn Nets | 0%— | 1%±0 | 1.0pp spread |
Indiana Pacers | 0%— | 1%±0 | 1.0pp spread |
Sacramento Kings | 0%— | 1%±0 | 1.0pp spread |
Washington Wizards | 0%— | 1%±0 | 1.0pp spread |
