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: Sep 26, 11:50 PM EST
Kalshi
This event tracks whether a professional baseball game between Arizona and San Diego will extend beyond the standard nine innings due to a tie score at the end of the ninth inning, requiring players to continue competing until one team takes the lead.
If at least 1 extra inning is played in the Arizona vs San Diego professional baseball game originally scheduled for Sep 26, 2026 at 8:40 PM EDT, then the market resolves to Yes.
Prediction market odds often reflect the collective wisdom of a diverse group of traders, and can sometimes differ from those offered by traditional sportsbooks. Sportsbooks set their lines based on statistical models and the perceived public’s betting tendencies, while this market allows anyone to express their belief about the outcome. If a significant number of informed bettors believe a sportsbook’s odds are inaccurate, they can trade here to capitalize on the discrepancy. This dynamic can lead to prediction market prices being more accurate, or at least representing a different perspective on the likelihood of events.
On Kalshi, this market is priced through a continuous order book where traders buy and sell contracts representing different outcomes. The price of each contract reflects the probability of that outcome occurring, as determined by supply and demand. As more people buy contracts for a particular result, the price increases, and vice versa. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. This means the price isn’t fixed, but rather fluctuates based on the collective actions of all participants trading in the Arizona-San Diego extra innings market. The current market reflects the aggregated expectations of those actively trading.
This market resolves around Sep 27, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the market will settle based on whether the Arizona versus San Diego baseball game goes into extra innings. Official game results and reporting from major sports news outlets will be used to determine the final outcome. The resolution will reflect the actual game result, providing a clear and objective determination of whether extra innings were played or not.
Several factors could influence trading activity in this market. Any news regarding potential starting pitchers, significant injuries to key players on either the Arizona or San Diego teams, or even changes in weather conditions could all shift trader sentiment. Unexpected lineup changes or in-game performance during the initial innings of the game could also cause the market to react. Generally, any information that alters the perceived probability of the game going to extra innings is likely to move prices in this market.