UFC Fight Night: Melissa Mullins vs. Bia Mesquita (Women's Bantamweight, Prelims)

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Market context

Melissa Mullins faces Bia Mesquita in a women’s bantamweight prelim, and the market’s **0% YES** price is out of line with the pre-fight betting picture. BetMGM listed Mesquita at **-650** and Mullins at **+425**, implying the Brazilian was a heavy favourite before the bout, while FanDuel also had Mesquita priced as the clear expected winner, including round-by-round finishing lines that still leaned her way[1][7].

That makes this contract easier to read against comparable UFC cases: where a debutant or specialist enters as a large sportsbook favourite, prediction markets usually only drift towards the underdog if there is a late injury, weight issue, or cancellation risk. Here, the available analyst and sportsbook consensus pointed in the same direction rather than diverging, so a 0% YES quote on Mullins looks like either a stale or effectively dead market rather than a genuine disagreement on fight pricing[1][7]. Tapology’s fight record later showed Mesquita winning by submission, which is consistent with the pre-fight favourite status and reinforces how thin the path was for a Mullins win[3].

The main catalysts for traders are official UFC announcements: whether the bout stayed on the card, any last-minute rebooking, and the official result, since this market also rolls to **50-50** if the fight is cancelled, postponed beyond the settlement window, or ruled a no contest. DraftKings still listed the matchup with contracts open for trading well beyond fight night, which highlights the importance of final UFC scoring and event status rather than pre-fight chatter alone[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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?

On Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Best Prediction Markets UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on Best Prediction Markets UK?

Zero. Best Prediction Markets UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.