UFC Fight Night: Karol Rosa vs. Luana Santos (Women's Bantamweight, Prelims)

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Market context

Karol Rosa and Luana Santos have already fought, and the official result is a **unanimous decision win for Luana Santos**. That makes the current market reading stale in practical terms: the crowd’s 0% YES implies it has not yet repriced around the completed bout, but the UFC’s result should be the decisive reference for settlement.[1][5]

The fight was framed pre-bout as a live bantamweight matchup between a higher-ranked veteran in Rosa and a rising contender in Santos, which is why a win for either side was plausible before cage time.[3][5] In comparable women’s bantamweight fights, markets can stay tight when the favourite is durable and the challenger is improving, but once an official decision lands, the post-fight settlement outcome usually becomes binary unless the result is later altered.[1][4]

For traders, the key catalyst is no longer scheduling but confirmation that the UFC result stands and is not overturned on review, because the market resolves from official UFC information.[5] The only remaining dependency is whether any late administrative change reclassifies the bout as a draw, no contest, or other non-result; absent that, the official decision strongly points to a Luana Santos settlement rather than a split or 50-50 outcome.[1][5]

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 Prediction Today, which mirrors the Polymarket order book directly.

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

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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.

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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.