TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 19, 1:40 PM EST
Polymarket
In the upcoming MLB game between the Boston Red Sox and New York Mets, scheduled for July 12 at 1:40PM ET: This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. This market will resolve to "New York Mets" if the New York Mets win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
In the upcoming MLB game between the Boston Red Sox and New York Mets, scheduled for July 12 at 1:40PM ET: This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. This market will resolve to "New York Mets" if the New York Mets win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
Prediction market odds and sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets aggregate the beliefs of traders risking real capital on outcomes. This market may show different implied probabilities than traditional sports betting sites, particularly if one venue attracts sharper or more specialized participants. Comparing the two can reveal where consensus is strongest and where informed traders see potential mispricings.
On Polymarket, this market is priced through an automated market maker that adjusts odds continuously as traders place orders. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each outcome share reflects the collective assessment of all participants; as more capital flows toward one team, its probability rises and the opposing team's falls. Traders can enter or exit positions at any time before resolution, and the spread between bid and ask prices tightens or widens based on liquidity and recent trading activity. This mechanism ensures prices stay responsive to new information and market sentiment.
This market resolves around Jul 19, 2026, once the game concludes and the final result is verifiable from credible public sources. The outcome will be confirmed based on the official score and result recorded by Major League Baseball. Until that point, traders can continue to buy and sell shares as odds shift in response to pre-game news, injury reports, weather, and other factors. Resolution is automatic once the event is complete and the data is confirmed.
Several catalysts can shift odds significantly before first pitch. Roster updates—such as key player injuries, roster moves, or last-minute lineup changes—often trigger sharp repricing. Weather conditions at the stadium, bullpen availability, and recent team performance streaks also influence trader positioning. Breaking news about starting pitcher health, umpire assignments, or travel delays can spark rapid volume spikes. Additionally, line movement at major sportsbooks sometimes precedes or follows prediction market adjustments, as informed bettors arbitrage opportunities across venues. Monitoring these signals helps traders time entries and exits strategically.