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

Platform comparison

Active sub-markets

Market context

Polymarket is still pricing this Karol Rosa vs Luana Santos contract at **0% YES**, which is effectively a zero-fuel read on Rosa winning on the current order book. The market resolves from official UFC result information, and because settlement is tied to the fight outcome rather than the broader card, a single judging decision, stoppage, or official no-contest call is what matters for the conditional token payout on Polygon in USDC.

That near-zero print is best read against the fact that this is a scheduled **women’s bantamweight prelim** at UFC Fight Night: Kape vs Horiguchi, set for the UFC Apex on 20 June 2026. Tapology lists the bout as a standard UFC matchup, while UFC’s own fighter pages place Luana Santos at 10-2-0 and frame a win here as the kind of result that can push her towards the division’s top 10.[1][3][4] For Polymarket users, the practical comparison is not “who is the better athlete” but how often late pricing stays pinned until official bout confirmation, then reprices sharply once the fight starts or the result leaks.

The main catalysts are straightforward: weigh-in and commission confirmation, any late-card reshuffle, and whether the prelim actually runs on schedule at the Apex.[1][2] Santos’ recent UFC content has emphasised the ranking upside of a Rosa win, which is the sort of narrative that can matter for market attention even if it does not change resolution mechanics.[4] If the bout is scratched, pushed beyond the settlement window, or ends in a draw, technical draw, or no contest, the market falls into its 50-50 fallback rather than paying out a side.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews UFC Fight Night: Karol Rosa vs. Luana Santos (Women's Bantamweight, Prelims) 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 Scam? — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Scam?, 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 Scam? 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.

What does it cost to trade on Polymarket Scam??

Zero. Polymarket Scam? routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.