TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 20, 4:04 PM EST
Kalshi
This event examines if the Boston Red Sox versus Tampa Bay Rays game on September 20, 2026, will go beyond the standard nine innings. A tie after nine innings triggers extra frames, continuing until one team secures a lead at the end of an inning. The result hinges on the competitive balance and scoring during the scheduled match.
If at least 1 extra inning is played in the Boston vs Tampa Bay professional baseball game originally scheduled for Sep 20, 2026 at 1:40 PM EDT, then the market resolves to Yes.
Typically, prediction market odds reflect the wisdom of the crowd, often differing from initial sportsbook lines. Sportsbooks set odds based on models and public perception, while this market allows individuals to trade on their own informed opinions. As more information becomes available and more people participate, the prices in this market can converge or diverge from sportsbook odds. It’s common to see prediction markets more accurately forecast outcomes, especially as event time approaches, because they aggregate a wider range of perspectives than traditional bookmakers.
On Kalshi, this market is priced through a continuous order book where traders buy and sell contracts representing potential outcomes. The price of each contract reflects the probability of that outcome occurring, as perceived by the market participants. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Traders are constantly adjusting their bids and asks based on new information and their own analysis, leading to dynamic price movements. The higher the demand for a particular outcome, the higher its price will climb, and vice-versa. This creates a real-time assessment of probabilities driven by collective intelligence.
This market resolves around Sep 20, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on whether the Boston Red Sox and Tampa Bay Rays game goes into extra innings. The final result will be determined by official game statistics and records. Traders who correctly predicted the outcome will be paid out according to the final market price at resolution. It’s important to monitor news sources leading up to the resolution date to stay informed about any potential factors that could influence the outcome.
Several factors could significantly impact this market. Any news regarding key player injuries for either the Red Sox or the Rays would likely cause price fluctuations. Weather forecasts predicting potential game delays or cancellations could also move the market. Furthermore, updates on pitching matchups or changes in team strategy could influence trader sentiment. Unexpected performance from key players during the game itself, even before extra innings are reached, could also lead to shifts in the market as traders react to the unfolding events. Monitoring these signals is crucial for informed trading.