TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 28, 6:29 PM EST
Kalshi
This event group covers a lightweight preliminary boxing match between Brady Ochoa and Adrian Serrano scheduled for Zuffa Boxing 8 on June 27-28, 2026. Markets resolve based on the official winner declared by the promotion, with provisions for draws, no contests, and cancellations.
This market will resolve to "Ochoa" if Brady Ochoa is officially declared the winner of the fight against Adrian Serrano at Zuffa Boxing 8: De Los Santos vs. Valenzuela, scheduled for June 27, 2026. It will resolve to "Serrano" if Adrian Serrano 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 July 11, 2026, this market will resolve "50-50." The resolution source for this market will be official information from https://www.ufc.com/.
Resolution is based on the winner of the Brady Ochoa vs Adrian Miguel Serrano boxing match originally scheduled for June 28, 2026. If the match is postponed or delayed, the market remains open and resolves after the rescheduled match concludes, within two weeks of the new date.
Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform attracts distinct trader demographics, liquidity pools, and fee structures, all of which influence how prices settle. Polymarket and Kalshi use different contract designs—one may frame the outcome as a binary yes/no, while the other uses winner-take-all mechanics—subtly shifting how traders interpret and price risk. Timing of large trades, platform-specific incentives, and variations in user base expertise can also widen the spread. Monitoring both venues helps you spot arbitrage opportunities and understand which platform's crowd is more confident in a particular fighter.