UFC Fight Night: Malcolm Wellmaker vs. Juan Diaz (Bantamweight, Main Card)

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Active sub-markets

Market context

Malcolm Wellmaker faces Juan Diaz in a bantamweight bout scheduled for the UFC Fight Night card headlined by Allen versus Costa on 16 May 2026. The fight will be contested at 135 pounds under standard UFC rules, with official victory determination by judges' scorecard, submission, knockout, or referee stoppage. Settlement hinges on the UFC's official result announcement; any cancellation, postponement beyond 30 May, or draw outcome triggers a 50-50 resolution.

The 0% implied probability reflects either minimal trading volume or genuine uncertainty about whether this matchup will materialise as scheduled. Historical precedent suggests bantamweight UFC Fight Night main-card bouts rarely cancel outright, though fighter withdrawals and medical suspensions do occur within the fortnight before competition. Comparable recent bantamweight matchups have settled cleanly when both fighters cleared pre-fight medical clearance and weigh-ins. The absence of any YES position suggests traders are either waiting for weigh-in confirmation or treating this as a low-liquidity market where initial pricing hasn't yet attracted participation.

Traders automating conditional orders should monitor UFC official announcements for fighter status updates, particularly medical clearances and weight-cut complications, which typically emerge five to seven days pre-event. The settlement window closes at 03:59:59 UTC on 17 May, allowing roughly 24 hours post-fight for official result confirmation. Any fighter withdrawal or injury announcement would immediately shift the market toward 50-50 resolution; conversely, successful weigh-ins and face-offs would likely trigger YES/NO positioning based on fighter form and recent performance data.

Methodology

This page reviews UFC Fight Night: Malcolm Wellmaker vs. Juan Diaz (Bantamweight, Main Card) across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Polymarket Bot UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Polymarket Bot 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.

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 Polymarket Bot UK?

Zero. Polymarket Bot 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 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.