UFC Fight Night: Oban Elliott vs. Michael Oliveira (Welterweight, Prelims)

Platform comparison

Market context

Oban Elliott faces Michael Oliveira in a welterweight prelim at UFC Fight Night, and the market’s 0% YES price is far below the rest of the pre-fight consensus. Sportsbooks and comparison pages have generally made Oliveira a strong favourite, with typical moneylines around the -330 to -345 range and Elliott priced roughly +260 to +275, while one tracking page also showed a model split of 57% for Oliveira and 43% for Elliott.[3][6][8]

That gap matters because prediction markets on fight contracts can move sharply when the fight is officially signed, weighed in, and kept on the card, but a 0% crowd-implied read suggests either no liquidity or a stale quote rather than a true consensus on Elliott. Comparable market setups usually align more closely with the book side when a fighter is listed as a sizeable favourite, so the current contract is meaningfully detached from the broader odds picture rather than reflecting a live disagreement.[3][12][16]

Traders should watch for the UFC’s official bout status, any last-minute card shuffles, and the result itself, because the market resolves only on an official UFC decision and flips to 50-50 if the bout is ruled a no contest, not scored, cancelled, or pushed back beyond the settlement window. Recent previews and odds boards have treated the fight as scheduled for the prelims, but line availability has been inconsistent across sources, with some pages saying no sportsbook had posted early and others showing multiple books and market prices already live.[2][3][6][18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track UFC Fight Night: Oban Elliott vs. Michael Oliveira (Welterweight, Prelims) across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Best Prediction Markets. 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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 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.