Dana White's Contender Series: Antonio Monteiro vs. Tyshawn Williams (Featherweight, Main Card) odds: Kalshi vs Polymarket
Tue, Sep 15, 2026, 7:00 PM ET · UFC fights · $13 traded in 24h across both venues.
Tyshawn Williams: Kalshi 75¢ vs Polymarket 74¢, +0.8 pp
Mid prices. A price is the market's probability: 75¢ means 75%. The gap is Kalshi minus Polymarket in percentage points.
Two separate exchanges, two accounts. Links may carry a referral code, which never changes what is shown. Disclosures.
-7.72¢ per $1, after fees
Buy Tyshawn Williams @ Polymarket 76¢, Antonio Monteiro @ Kalshi 29¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Tyshawn Williams | 71¢ / 79¢ | 73¢ / 76¢ | +0.8 pp |
| Antonio Monteiro | 23¢ / 29¢ | 24¢ / 28¢ | +0.2 pp |
Price history, last 3 days
How this is matched
Games are matched across the two exchanges by league, team codes and date. Polymarket prices come from its live order book, Kalshi from its public API. Refreshed every 45 seconds.
What this is not
Read-only. Nothing here places or routes orders and nothing is advice. Fees, slippage and the time it takes to move money between venues are not in these numbers.