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Boston Red Sox vs. New York Yankees

Post
KalshiPolymarket Closes Sep 30, 2026
LIVE PRICES — YES
KalshiTrade ↗
51¢ last
BidAsk
YES50¢51¢
NO49¢50¢
$1,040 volume
PolymarketBEST YES PRICETrade ↗
41¢ last
BidAsk
YES40¢41¢
NO59¢60¢
$4,785 volume
Cross-venue spread 10.0¢· active arbitrage window
CROSS-VENUE ARBITRAGE

Buy YES on Polymarket and NO on Kalshi — total cost 91¢ per $1 payout, locking +9.0¢ per contract before fees.

30-DAY PRICE HISTORY
HOW THIS RESOLVES

Kalshi — primary rule

If Boston wins the New York R vs Boston NHL game originally scheduled for Sep 29, 2026, then the market resolves to Yes.

Polymarket — resolution criteria

In the upcoming MLB game between the Boston Red Sox and New York Yankees, scheduled for September 30 at 3:33AM ET: This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. This market will resolve to "New York Yankees" if the New York Yankees 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.

Show full rules
STATS
Cross-venue spread10.0¢
Kalshi last51¢
Polymarket last41¢
Venues2
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