UFC odds on Kalshi vs Polymarket
UFC fight markets. Right now there are 37 open UFC markets — 25 on Kalshi, 12 on Polymarket — carrying $210k of volume in the last 24 hours.
Open UFC markets, by volume
| Market | Venue | Yes | 24h volume | Closes |
|---|---|---|---|---|
| 331: Van vs Pantoja — Alexandre Pantoja | kalshi | 44¢ | $30k | 09-20 07:20 UTC |
| 331: Van vs Pantoja — Joshua van | kalshi | 56¢ | $27k | 09-20 07:20 UTC |
| UFC 331: Renato Moicano vs. Brian Ortega (Lightweight, Main Card) | polymarket | 51¢ | $19k | 09-19 21:00 UTC |
| UFC 331: Arman Tsarukyan vs. Mauricio Ruffy (Lightweight, Main Card) | polymarket | 74¢ | $15k | 09-19 21:00 UTC |
| 331: Tsarukyan vs Ruffy — Mauricio Ruffy | kalshi | 28¢ | $14k | 09-20 07:00 UTC |
| 331: Tsarukyan vs Ruffy — Arman Tsarukyan | kalshi | 74¢ | $14k | 09-20 07:00 UTC |
| 331: Steveson vs Sharaf — Gable Steveson | kalshi | 92¢ | $8k | 09-20 05:00 UTC |
| UFC 331: Tai Tuivasa vs. Robelis Despaigne (Heavyweight, Prelims) | polymarket | 17¢ | $7k | 09-19 21:00 UTC |
| 331: Shahbazyan vs Ferreira — Edmen Shahbazyan | kalshi | 62¢ | $6k | 09-20 04:00 UTC |
| UFC 331: Casey O'Neill vs. Eduarda Moura (Women's Flyweight, Early Prelims) | polymarket | 69¢ | $6k | 09-19 21:00 UTC |
| UFC 331: Marlon Vera vs. Charles Jourdain (Bantamweight, Prelims) | polymarket | 33¢ | $6k | 09-19 21:00 UTC |
| UFC 331: Alexandre Pantoja vs. Joshua Van (Flyweight, Main Card) | polymarket | 46¢ | $5k | 09-19 21:00 UTC |
| 331: Menifield vs Baraniewski — Iwo Baraniewski | kalshi | 69¢ | $4k | 09-20 06:00 UTC |
| 331: Pitbull vs Choi — Doo Ho Choi | kalshi | 72¢ | $4k | 09-20 06:40 UTC |
| 331: Vera vs Jourdain — Marlon Vera | kalshi | 35¢ | $4k | 09-20 04:40 UTC |
| 331: O'Neill vs Moura — Casey O'Neill | kalshi | 67¢ | $3k | 09-20 02:40 UTC |
| 331: Chikadze vs Brito — Joanderson Brito | kalshi | 78¢ | $3k | 09-20 03:00 UTC |
| 331: Chikadze vs Brito — Giga Chikadze | kalshi | 23¢ | $3k | 09-20 03:00 UTC |
| UFC 331: Edmen Shahbazyan vs. Brunno Ferreira (Middleweight, Early Prelims) | polymarket | 61¢ | $3k | 09-19 21:00 UTC |
| 331: Vera vs Jourdain — Charles Jourdain | kalshi | 66¢ | $3k | 09-20 04:40 UTC |
The 20 most active of 37, by 24h volume across both venues, refreshed every few minutes. A market listed on only one venue has no cross-venue price to compare against — which is true of most of them.
What two venues' prices are worth
A gap between Kalshi and Polymarket on the same UFC market is usually fees, depth, or two contracts that settle differently — not free money. The arbitrage guide shows today's gaps before and after fees, and the fee page shows why the cost peaks near 50¢.
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