UFC Fight Night: Yuneisy Duben vs. Jeisla Chaves (Women's Flyweight, Prelims)

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Active sub-markets

Market context

On 6 June 2026, flyweight fighters Yuneisy Duben and Jeisla Chaves will compete in a preliminary bout at UFC Fight Night: Muhammad vs. Bonfim. In a prediction market, a YES share represents a bet that Duben wins; a NO share represents a bet that Chaves wins. The current 0% probability assigned to YES reflects either minimal trading activity, strong consensus backing Chaves, or insufficient market liquidity at this early stage. Traders purchase shares at fractional prices—a YES share at 5p, for instance, pays £1 if Duben wins—and the market price adjusts as new information arrives and participants trade.

Preliminary UFC bouts involving lesser-known fighters typically attract sparse early trading, particularly when neither competitor has significant recent mainstream coverage. Duben and Chaves operate at the lower end of the UFC's visibility hierarchy, meaning historical precedent offers limited direct comparison. However, preliminary-round women's flyweight contests have historically resolved with modest prediction-market participation; the 0% reading may signal genuine underdog assessment rather than informed consensus. Traders should note that preliminary fights are occasionally rescheduled or moved to main-card slots depending on injury or card restructuring, which would alter the settlement window.

The critical catalyst remains official UFC confirmation of the bout's timing and venue. Any announcement regarding fighter injury, withdrawal, or card changes before 6 June would immediately shift market dynamics. Traders should monitor UFC's official social channels and MMA news outlets for roster updates. The settlement window closes 7 June 2026 at 03:59:59 UTC, allowing a narrow window for result confirmation. Should the bout be postponed beyond 20 June, the market resolves 50-50 regardless of eventual outcome.

Methodology

We track UFC Fight Night: Yuneisy Duben vs. Jeisla Chaves (Women's Flyweight, Prelims) on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Is this market available outside the US?

Prediction Market 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'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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market UK triggers a quick verification flow that finishes in minutes.

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.