TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 31, 9:14 PM EST
Kalshi
The event refers to a professional baseball game scheduled to take place between two teams. It specifically concerns whether the game will extend beyond the regular nine innings due to a tie score at the end of the ninth inning. The focus is on determining if additional innings will be required to produce a winner.
If Pittsburgh and Cincinnati go to extra innings in the Pittsburgh vs Cincinnati professional baseball game originally scheduled for Jul 31, 2026 at 6:10 PM EDT, then the market resolves to Yes.
On Kalshi, traders in the extra innings market price the likelihood of the game extending past the ninth inning based on their own assessments, which often differ from traditional sportsbook lines. Sportsbook odds incorporate broader public betting patterns and professional handicapping, while this market reflects a more niche, trader-driven perspective. The difference can be notable, especially when sharp betting trends or injury news shift trader sentiment without fully impacting mainstream sportsbooks yet. Monitoring both can reveal where the most informed money is placing its bets.
On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Kalshi, this market uses a logarithmic market design that balances liquidity and accuracy. Traders buy or sell contracts representing the chance of extra innings occurring, with prices naturally converging toward the perceived probability as trading volume grows. The current top outcome reflects the aggregate wisdom of participants, adjusted continuously by new bets. Volume of $3,787 supports this dynamic pricing model, allowing rapid adjustments to breaking news or shifting expectations among participants.
This market resolves around Aug 1, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result is determined by whether the game in question goes beyond the standard nine innings, as officially recorded by league authorities and reported across major sports news outlets.
In the coming weeks, key signals like starting pitcher announcements, weather forecasts for the game date, and early-inning scoring trends could strongly influence this market. Any indication that one team has a significant advantage in late-inning pitching — through injuries, fatigue, or strategic roster moves — may push trading activity. As Aug 1, 2026 approaches, real-time game updates, such as early leads or rain delays, will be closely watched by traders, potentially creating sharp price swings right up to resolution.