TOTAL VOLUME:
$134b
24H VOL:
$107,351,958
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,416,970,024
400,720
Markets across
30,097
events
MATCHED EVENTS:
2,633
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 27, 12:30 AM EST
Kalshi
A professional baseball match between the Houston Astros and the Oakland Athletics is set for September 26, 2026. The event will be decided based on whether the game extends beyond the regular nine innings into extra play.
If at least 1 extra inning is played in the Houston vs A's professional baseball game originally scheduled for Sep 26, 2026 at 9:40 PM EDT, then the market resolves to Yes.
Often, prediction market odds reflect a different perspective than those found at sportsbooks. Sportsbooks set lines to balance action and incorporate a profit margin, while this market represents the collective wisdom of traders. If a significant number of traders believe extra innings are likely, the price will move accordingly, potentially diverging from sportsbook odds. This can occur due to differing information or interpretations of the game’s dynamics. It’s common to see discrepancies, especially when public sentiment strongly favors one outcome over another.
On Kalshi, this market is priced through a continuous auction mechanism where traders buy and sell contracts representing their belief about whether extra innings will occur in the Houston vs A's game. The price of a contract ranges from 0 to 100, representing the probability of the 'yes' outcome (extra innings). On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders buy 'yes' contracts, the price increases, and vice versa. This dynamic pricing reflects the aggregated predictions of all participants, creating a real-time assessment of the likelihood of extra innings.
This market resolves around Sep 27, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will depend on whether the Houston vs A's game, originally scheduled for September 26, 2026, ultimately goes into extra innings. Official game results, as reported by major sports news outlets and the league itself, will be used to determine the final outcome. The market will then settle based on whether extra innings were played during that game.
Several factors could influence the price of this market. Any news regarding potential starting pitchers, weather forecasts predicting rain delays (which could impact the game's length), or injuries to key players could all shift trader sentiment. Unexpected lineup changes or reports about team strategies could also play a role. Even general public discussion and analysis of the matchup could contribute to price movements as traders react to new information and refine their predictions about the likelihood of extra innings.