The following market refers to the O'Neill vs Moura professional MMA fight originally scheduled for Sep 19, 2026. If this fight is postponed or delayed, the market will remain open and close after the rescheduled fight has finished (within two weeks). If the fight is declared a tie or no contest, the market will resolve to 50/50 for both fighters. If the fight is cancelled or rescheduled to over two weeks away, the market will resolve to a fair price in accordance with the rules. This market and these products have not been endorsed by Zuffa LLC, d/b/a Ultimate Fighting Championship, UFC. Any references to the “UFC,” or any other associated marks are descriptive only, and do not indicate an endorsement of this product or any affiliation between Zuffa and Kalshi.

Resolution Oracles

Kalshi Rules

Novig

Primary Rule

Casey O'Neill in Eduarda Moura @ Casey O'Neill (UFC); settled by Novig.

Edge Cases

If the contract cannot be settled on the stated outcome, Novig settles it at fair market value (FMV) instead of refunding it.

Polymarket

Primary Rule

This market will resolve to "Casey O'Neill" if Casey O'Neill is officially declared the winner of the fight against Eduarda Moura at UFC 331: Van vs. Pantoja 2, scheduled for September 19, 2026. It will resolve to "Eduarda Moura" if Eduarda Moura is officially declared the winner. If the fight is declared a draw or technical draw, ruled a No Contest, not scored, canceled, or postponed beyond October 3, 2026, this market will resolve "50-50." The resolution source for this market will be official information from the UFC.

Resolution Oracles

UMA Optimistic Oracle

Polymarket US

Primary Rule

This market will settle to the winner of the Casey O'Neill vs Eduarda Moura UFC fight scheduled for September 19 at 5:00PM ET. If the fight ends in a draw or is declared a no contest, the market will settle to $0.50. If the fight is cancelled before the opening bell, the market will settle to the last fair market price. If the fight is not held within two weeks of the originally scheduled date, the market will settle to the last fair market price. Outcome sourced from UFC.

ProphetX

Primary Rule

Sports moneyline - resolves based on official game outcome per ProphetX Prediction Rules

Resolution Oracles

ProphetX Rules

Frequently Asked Questions

What does the Casey O'Neill vs. Eduarda Moura prediction market track?

The outcomes listed above show how traders are pricing this question. Compare outcome prices from Kalshi, Polymarket US, Novig, Polymarket, ProphetX in one place. Each price reflects the market’s implied probability, not a guaranteed result.

What are the latest Casey O'Neill vs. Eduarda Moura odds?

The latest available prices are Casey O'Neill: 67.5¢ on Kalshi, 67.0¢ on Polymarket, 67.7¢ on ProphetX, 62.0¢ on Polymarket US, 67.0¢ on Novig; Eduarda Moura: 32.5¢ on Kalshi, 33.0¢ on Polymarket, 35.4¢ on ProphetX, 38.0¢ on Polymarket US, 33.0¢ on Novig. Prices are quoted in cents per $1 share. Check the venue for executable prices and available liquidity.

Why do Casey O'Neill vs. Eduarda Moura odds vary across prediction markets?

The largest price difference shown across venues is 5.7 percentage points. Venues have different traders, liquidity and fees, so their prices can differ. A price gap alone does not establish an executable arbitrage opportunity; compare settlement rules and the actual buy and sell prices.

How do Casey O'Neill vs. Eduarda Moura prediction market payouts work?

For example, Casey O'Neill at 66.2¢ implies about a 66.2% chance. For a standard $1 contract, a share pays $1 if its outcome settles as correct and $0 if it settles as incorrect. A winning share bought at 40¢ earns 60¢ before fees. Check each venue’s settlement rules, fees and eligibility before trading.

Casey O'Neill vs. Eduarda Moura

Casey O'Neill vs. Eduarda Moura

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About This Market

Price History

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Moneyline

Method of Victory

Total Rounds

Goes the Distance

Smart Trade Router

Resolution Oracles

Frequently Asked Questions

Casey O'Neill vs. Eduarda Moura

Casey O'Neill vs. Eduarda Moura

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About This Market

Price History

Live Markets

Moneyline

Method of Victory

Smart Trade Router

Resolution Oracles

Market Rulebook: Casey O'Neill vs. Eduarda Moura

Frequently Asked Questions