UFC Fight Night: Andre Fili vs. Vinicius Oliveira (Featherweight, Main Card)

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Active sub-markets

Market context

Polymarket is pricing this featherweight bout at **100% YES** on the Andre Fili side, which leaves the contract effectively pinned unless the official UFC result comes back differently or the fight is ruled into the market’s 50-50 bucket. On Polymarket, the position is held as conditional tokens on Polygon and settled in USDC, so the only thing that matters for resolution is the UFC’s official announcement of the winner, with no room for sportsbook-style interpretation once the result is posted.

That top-end price is consistent with how one-sided fight markets can look once the bout is complete and the result is already circulating. DraftKings listed Vinicius Oliveira as a clear favourite at -305 and Fili as a +245 underdog ahead of the contest, while UFC and Tapology both had the fight scheduled for UFC Fight Night: Kape vs Horiguchi at the UFC Apex in Las Vegas.[1][2][4] UFC’s own post-fight video also identifies Oliveira as having beaten Fili by TKO, which points away from any genuine ambiguity over settlement and towards the market simply awaiting formal confirmation.[7]

For traders, the only meaningful catalysts are the official UFC result, any later correction from the promotion, or an unusual administrative outcome such as a no contest, technical draw, cancellation or postponement beyond the settlement window. With the market description tied to the UFC’s official information, the practical watch-list is the bout result page and any commission-level change to the ruling, not fan clips or sportsbook grades.[4][7] If the official record stands as a Oliveira win, the market should resolve accordingly; if the result is altered into one of the exception cases, it would fall to 50-50.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track UFC Fight Night: Andre Fili vs. Vinicius Oliveira (Featherweight, Main Card) 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Legit?, 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?

Polymarket Legit? 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.

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, Polymarket Legit? 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.