UFC 328: Joaquin Buckley vs. Sean Brady (Welterweight, Main Card)

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Active sub-markets

Market context

Joaquin Buckley and Sean Brady are scheduled to compete in a welterweight bout on the main card of UFC 328, headlined by Khamzat Chimaev versus Sean Strickland on 9 May 2026. The current market probability of 100% for Buckley suggests either incomplete information availability or a technical artefact, as competitive UFC matchups rarely settle at such extremes absent fighter withdrawal or official cancellation.

Buckley, a welterweight with notable knockout power and recent momentum, faces Brady, an accomplished grappler with a solid UFC record. Historical UFC welterweight matchups between strikers and grapplers of comparable ranking typically resolve with probabilities in the 45–55% range, depending on specific stylistic advantages and recent form. The 100% probability currently reflected does not align with standard market behaviour for competitive bouts and warrants scrutiny regarding settlement conditions or data feed issues.

Traders should monitor official UFC announcements regarding fighter health, weight-cut complications, or late withdrawals, which would trigger resolution under the "50-50" clause if the bout is cancelled or postponed beyond 23 May 2026. The settlement window closes on 10 May 2026, three hours after the scheduled event conclusion. Any official UFC statement on fighter status or bout card changes should be tracked through UFC.com and major MMA news outlets such as MMA Junkie or Sherdog, as these represent the primary sources for resolution determination.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for UFC 328: Joaquin Buckley vs. Sean Brady (Welterweight, Main Card) plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

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.

Is this market available outside the US?

PolyGram 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'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.

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.