UFC Fight Night: Khaos Williams vs. Nikolay Veretennikov (Welterweight, Prelims)

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Market context

Khaos Williams and Nikolay Veretennikov were scheduled to meet in a welterweight prelim at UFC Fight Night: Allen vs Costa. The market is already priced at 100% YES, which usually means the contract is being treated as effectively settled in the favourite’s favour, or that order flow is extremely one-sided with little liquidity left for price discovery. In event markets like this, the main practical driver is not opinion on the bout itself but whether traders can get funds in and out quickly enough to keep taking the same side, especially where deposits, withdrawal fees, and on-ramp friction vary across Klarna, SEPA and USDC rails.

The closest comparable cases are short-notice UFC prelim markets where the wider audience only arrives once the bout is close to official confirmation, and then depth can still widen late if there is accessible funding. When payment options are cheap and immediate, the book tends to absorb more small tickets and sustain a high implied probability; when funding is slower or more expensive, the price can stick near a ceiling even without broad conviction. The UFC stats listing shows Williams at 15-5 and Veretennikov at 14-7, so there is no obvious mismatch that would normally justify a fully maxed-out probability on fight strength alone.

Traders should watch for official UFC bout confirmations, any late weigh-in or medical issues, and the event’s final fight order, because prelim bouts can move in and out of sharp attention as settlement approaches. The key dependency for depth here is capital flow rather than new information: if a payment rail such as SEPA or USDC allows rapid re-entry, liquidity can stay active into the closing window; if not, the market may remain pinned with very little two-way trade. Recent fight listings on SofaScore and UFCStats indicate the bout was on the card, but only the UFC’s official result will determine settlement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, 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?

On PolyGram, 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.

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 it cost to trade on PolyGram?

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

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.