TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 18, 5:54 PM EST
Kalshi
This event group covers a heavyweight preliminary fight between Alvin Hines and RJ Harris scheduled for UFC Fight Night: Du Plessis vs. Usman on July 18, 2026. Markets span fighter winner selection, method of victory (KO/TKO, submission, distance), and round duration thresholds. Resolution depends on official UFC fight outcome and timing data.
This market will resolve to "Alvin Hines" if Alvin Hines is officially declared the winner of the fight against RJ Harris at UFC Fight Night: Du Plessis vs. Usman, scheduled for July 18, 2026. It will resolve to "RJ Harris" if RJ Harris 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 August 1, 2026, this market will resolve "50-50." The resolution source for this market will be official information from the UFC.
This event covers a professional MMA fight originally scheduled for July 18, 2026. If the fight is postponed or delayed, the market remains open and closes after the rescheduled fight concludes within two weeks. In the event of a tie or no contest, both fighter markets resolve to 50/50. If the fight is cancelled or rescheduled beyond two weeks, the market resolves to a fair price in accordance with applicable rules. The market is not endorsed by Zuffa LLC or the UFC.
Prediction markets and sportsbooks price odds differently because they operate on distinct mechanisms. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets let traders themselves determine prices through supply and demand. This market reflects what thousands of independent traders believe will happen, often incorporating real-time information faster than traditional sportsbooks adjust their lines. Prediction market prices tend to be more efficient at pricing niche or preliminary events where sportsbook liquidity is thin. Comparing this market's odds to your preferred sportsbook can reveal value opportunities, especially on undercard fights with less mainstream attention.
Fighter news is the primary catalyst: injuries, weight-cut issues, or withdrawal announcements would trigger sharp repricing. Training camp updates, coaching changes, or public statements from either fighter can shift trader sentiment. Weigh-in results and official fighter confirmations typically cause late-stage volatility. Comparative fighter performance data—recent fight footage, strength metrics, or head-to-head records—may surface new information that adjusts odds. Media coverage and expert commentary can also influence retail trader positioning. Finally, any UFC schedule adjustments or venue changes could impact market dynamics as the event date approaches.