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 one-sided matchup, but the market is not at a normal “locked” level: the crowd is at **100% YES** for Asplund even though the broader betting strip is closer to the low-70s on win probability. Across sportsbook references, Asplund sits around -290 to -305, with Pat roughly +240 to +260, which implies a meaningful favourite but still leaves enough upset risk that a programmatic trader would typically avoid treating the market as a pure binary certainty.[1][6][12]

Comparable MMA markets usually soften away from 100% only when the fight is officially confirmed, weigh-ins are complete, and there is no late injury, miss, or card reshuffle. Here, model and market comparisons are mixed: one MMA index page gives a Pat-side “Yes” probability of 44% for a related market, while other pages put Asplund around 70% in prediction-market style pricing and roughly 71-72% after vig removal in sportsbook terms.[2][7][12][15] That gap matters for tooling, because a copy-trading or conditional-order setup would generally need to distinguish between *event certainty* and *outcome certainty* rather than reading the market’s current 100% label as a final resolution signal.[13]

For traders watching catalysts, the practical checks are straightforward: confirm the official UFC bout order for the main card, watch for any late change to the August 8, 2026 schedule, and monitor weigh-in and medical-status reporting in case the fight is moved, cancelled, or ruled a no contest, all of which would push the market towards 50-50 under the resolution rules.[8][13] The UFC calendar listing and sportsbook pages are already aligned on the matchup and date, so the main remaining dependency is official fight-night execution rather than any fresh pricing discovery.[1][8][17]

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 Fees, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.