TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 22, 5:28 AM EST
Opinion
In the upcoming MLB game, scheduled for 2026-07-22 00:10 UTC: If the Miami Marlins win, the market will resolve to "Miami Marlins". If the Houston Astros win, the market will resolve to "Houston Astros". The result will be determined based on the final score including any extra innings. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or officially ends in a tie, this market will resolve 50-50. Resolution Source: https://www.mlb.com/ Note: Opinion will resolve strictly based on the first officially published result from the designated source. Any subsequent revisions will not affect this resolution.
In the upcoming MLB game, scheduled for 2026-07-22 00:10 UTC: If the Miami Marlins win, the market will resolve to "Miami Marlins". If the Houston Astros win, the market will resolve to "Houston Astros". The result will be determined based on the final score including any extra innings. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or officially ends in a tie, this market will resolve 50-50. Resolution Source: https://www.mlb.com/ Note: Opinion will resolve strictly based on the first officially published result from the designated source. Any subsequent revisions will not affect this resolution.
Prediction markets and sportsbooks price games differently because they operate under distinct incentive structures. Sportsbooks set odds to balance action and lock in profit margins; prediction markets reflect what traders actually believe will happen, since they profit by being right, not by balancing bets. This market often moves faster than traditional lines when breaking news hits—a star player's injury or a bullpen change can ripple through trader positions within minutes. Over time, prediction market prices tend to converge toward real-world outcomes because traders with accurate forecasts accumulate capital and influence pricing. Comparing this market's odds to major sportsbooks can reveal where public perception and informed traders diverge.
On Opinion, this market is priced through a continuous order-book mechanism where traders submit buy and sell orders for outcome shares. On Opinion, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The spread between bid and ask prices reflects the market's confidence and liquidity at any moment. As new information arrives—team news, weather updates, or betting action—traders adjust their orders, and the mid-price shifts to reflect the crowd's updated belief. Higher trading volume typically narrows spreads and improves price discovery, while thinner volume can widen gaps between buy and sell prices. You can watch the order book in real time to see where the smart money is positioning before the game begins.
This market resolves around Jul 22, 2026, after the game concludes and the final result is verified. The outcome is confirmed once the event is verifiable from credible public reporting—typically official league records or widely syndicated sports news sources. Once the game ends, the winning outcome shares are worth their full value, and losing shares expire worthless. Resolution is automatic and does not require manual intervention, so traders can expect payouts shortly after the result is official. Check the platform's event page for any final updates or clarifications as game time approaches.
Key catalysts for this market include roster changes—trades, call-ups, or injuries to star players on either side—which can shift win probability significantly. Weather conditions at game time, especially wind and temperature, affect ball carry and pitcher performance. Recent team form, head-to-head history, and bullpen availability are live signals traders monitor. Betting action from sharp money or large syndicates can also trigger repricing as informed traders position ahead of the game. Line movement at major sportsbooks sometimes precedes prediction market moves, so watching for sudden shifts in traditional odds can alert you to incoming information. Closer to game time, lineup announcements and final injury reports often spark the sharpest price moves.