New York Yankees vs. Boston Red Sox

Platform comparison

Active sub-markets

Market context

On 26 June 2026 at 7:10 PM ET, the New York Yankees face the Boston Red Sox in a regular-season MLB clash at Fenway Park. In prediction markets, a YES share pays out if the selected outcome occurs—here, if the Yankees win—while a NO share pays out if they do not. The current crowd-implied probability of 0% for a Yankees win is starkly unusual for a matchup between two historically strong teams, suggesting the market may be mispricing the event or reacting to unconfirmed information.

Historically, Yankees–Red Sox games have rarely produced such extreme odds; even when one side is favoured, probabilities typically hover between 40% and 60%. Comparable cases from the 2024 and 2025 seasons show that 0% implied probabilities often precede corrections once lineups are confirmed or injuries are clarified. Traders should watch for official pitching announcements, starting lineups, and any late injury reports from either club, as these are the primary catalysts that could shift the probability. Recent coverage on theScore notes the Red Sox were listed as favourites at -125 with an over/under of 8.5, indicating the market initially expected a Red Sox edge, not a Yankees blackout [1].

With the settlement window ending on 3 July 2026, traders must monitor whether the game is postponed or cancelled, as a cancellation would resolve the market at 50–50. The Yankees’ current 48–32 record and the Red Sox’s 33–46 standing suggest a significant performance gap, yet the 0% probability remains inconsistent with these fundamentals [4]. Until official confirmation of lineups or a game status update, the market’s extreme pricing warrants caution and further scrutiny.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track New York Yankees vs. Boston Red Sox on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Market UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Prediction Market UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market UK triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.