UFC Fight Night: Steven Asplund vs. Guilherme Pat (Heavyweight, Main Card)

Platform comparison

Market context

Steven Asplund’s heavyweight bout with Guilherme Pat is priced as a clear favourite spot across traditional books, but the market is not unanimous on how strong that edge should be. Sportsbooks cluster around Asplund in the -290 to -325 range, which implies roughly a 74-76% win chance, while Kalshi is around 72% and Polymarket closer to 70%, leaving only a modest gap between exchange pricing and book lines.[1][3][4][8][15] That makes the current 100% crowd-implied probability for a straight Asplund result look far more aggressive than the underlying cross-platform consensus, especially because some analyst and model output is less lopsided: one consensus-style MMA Index page shows Asplund at 56% on a vig-free basis, and Combat Edge’s model is closer to 57-43 than to a near-lock.[2][6]

The main comparison case here is a heavy favourite whose price has tightened without fully reaching certainty, which is common in UFC markets where one clean punch can overturn pre-fight probability. Asplund is repeatedly described as the side with the stronger knockout profile, and several previews link his recent wins to stoppage potential, but that cuts both ways in a heavyweight fight where volatility is high and the fight-ending method matters as much as the winner.[12][15][17] For traders, the key catalysts are the official UFC bout status, weigh-in and medical clearance, and any late card reshuffle, because the market only resolves on an official UFC winner announcement and will flip to 50-50 if the bout is cancelled, no-contest, or pushed beyond the settlement window.[3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.