Houston Astros vs. New York Yankees

Platform comparison

Market context

The Houston Astros’ visit to the New York Yankees was priced as a modest Yankees edge in the pre-game market, with most books clustering the home side around -115 to -128 and the Astros around +106 to +118, implying roughly a 53-56% Yankees win chance versus the contract’s 28% YES price on Houston. That gap is large enough to signal the prediction market is materially more pessimistic on Houston than the sportsbook consensus, while one model-led outlet put the Astros closer to a quarter chance and another listed them around 25%, broadly in line with the contract.

Recent comparable pricing also pointed towards a lower-scoring, tightly lined game rather than a lopsided mismatch, with totals sitting mostly at 8.5 or 9 and the run line favouring New York by 1.5. Houston’s roster sheet showed multiple absences, including Carlos Correa on the injured list, while one preview had Peter Lambert as Houston’s probable starter and the Yankees’ starter still listed as TBD, leaving late pitching confirmation as the main variable for any cross-platform move. The game time itself is fixed at 7:05 p.m. ET on 26 August, so the key catalysts are the final line-up cards, any starter announcement, and whether the game starts on time, is postponed, or becomes a make-up fixture within the settlement window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.