TOTAL VOLUME:
$134.2b
24H VOL:
$134,145,987
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,441,166,947
406,422
Markets across
30,383
events
MATCHED EVENTS:
2,688
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 12, 10:14 PM EST
Polymarket
This event group covers a single NPB (Nippon Professional Baseball) game between the Orix Buffaloes and Saitama Seibu Lions scheduled for July 4, 2026 at 5:00 AM EDT. Markets across Polymarket and Kalshi are betting on the outcome of this matchup.
In the upcoming NPB game, scheduled for July 4 at 5:00AM ET: If the Orix Buffaloes win, the market will resolve to "Orix Buffaloes". If the Saitama Seibu Lions win, the market will resolve to "Saitama Seibu Lions". 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.
Resolution is based on the final result of the game originally scheduled for July 4, 2026 at 5:00 AM EDT. If the game is postponed or delayed, markets remain open and close after the rescheduled game concludes within two days. Should the game be cancelled or rescheduled beyond two days, markets resolve to a fair price per official rules. In the event of a tie, all markets resolve to 50/50.
On Polymarket, traders set odds through an automated market maker, while Kalshi uses an order-book model, creating structural differences in price discovery. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Polymarket typically attracts larger volumes and faster-moving capital, which can lead to tighter spreads but also rapid repricing. Kalshi's order-book design may result in wider spreads during low-activity periods, but it can also reflect more deliberate positioning by specialized traders. Geographic user bases, fee structures, and platform-specific liquidity also influence how quickly each venue incorporates new information about the matchup.
Key injury announcements, lineup changes, or roster updates for either team can trigger sharp repricing across both platforms. Weather conditions, travel delays, or venue-specific factors may also influence trader sentiment. Major betting syndicates placing large positions on either side can shift prices noticeably, especially on lower-liquidity platforms. Breaking news about player performance trends, head-to-head records, or recent form will likely prompt traders to adjust their positions. Monitor team social media, official league communications, and sports news outlets for developments that could move this market meaningfully before the game begins.