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: Sep 8, 11:14 PM EST
Kalshi
The outcome depends on whether the Arizona Diamondbacks and Kansas City Royals game scheduled for September 8 requires extra innings to determine a winner. If neither team leads after the ninth inning, players will engage in additional rounds. The market applies only if the contest occurs exactly as scheduled that evening.
If at least 1 extra inning is played in the Arizona vs Kansas City professional baseball game originally scheduled for Sep 8, 2026 at 7:40 PM EDT, then the market resolves to Yes.
Prediction market odds often reflect the collective wisdom of a diverse group of traders, potentially differing from those set by sportsbooks. Sportsbooks establish lines based on statistical models and expert analysis, aiming to balance action on both sides of a bet. This market, however, allows anyone to express their belief about the likelihood of extra innings, leading to odds that can diverge from traditional sportsbooks as new information emerges or public sentiment shifts. It’s common to see prediction markets incorporate information faster than sportsbooks, particularly in response to late-breaking news.
On Kalshi, this market is priced through a continuous order book where traders buy and sell contracts representing the probability of extra innings in the Arizona vs Kansas City game. The price of a contract ranges from 0 to 100, representing the implied probability of the event occurring. As more traders buy contracts, the price increases, indicating a higher perceived chance of extra innings. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market depth and trading activity influence the price, creating a dynamic reflection of collective belief. Traders aim to profit by accurately predicting the outcome and capitalizing on price discrepancies.
This market resolves around Sep 9, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the resolution will depend on whether extra innings are played in the Arizona vs Kansas City game. Official game results from a trusted sports data source will determine the final outcome. The market will then settle based on whether extra innings occurred, paying out to those who correctly predicted the result. Traders should monitor official sources for confirmation as the game progresses.
Several factors could influence trading activity and move this market before resolution. Changes in the starting pitchers for either the Arizona or Kansas City team, weather forecasts predicting potential delays or disruptions, and any late-breaking news regarding player injuries could all significantly impact the perceived likelihood of extra innings. Furthermore, the performance of both teams in preceding games and overall season trends might influence trader sentiment. Any information suggesting a closely contested game is likely to increase the probability of extra innings, driving up prices in this market.