Milwaukee Brewers vs. Houston Astros

Platform comparison

Active sub-markets

Market context

The Milwaukee Brewers will host the Houston Astros on 31 May at 2:10 PM ET in a regular-season Major League Baseball fixture. This binary market resolves to the Brewers if they win, to the Astros if Houston prevails, and 50-50 in the event of postponement without rescheduling or an official tie. The settlement window extends to 7 June 2026, allowing for weather delays or fixture rearrangement common in early summer baseball scheduling.

The 0% implied probability for a Brewers victory reflects either strong market consensus favouring Houston or minimal trading volume at the current moment. Historical context matters here: the Astros have maintained a higher regular-season win percentage than the Brewers over the past three seasons, though divisional matchups often diverge from season-long trends. Recent head-to-head records between these clubs, injury status of key pitchers, and home-field advantage typically anchor such assessments in comparable markets.

Traders should monitor roster announcements through late May, particularly starting pitcher confirmation and any late-breaking injuries to position players. Weather forecasts for Milwaukee on 31 May carry operational weight, as does any official league communication regarding schedule adjustments. The CFTC's regulatory framework applies to US-domiciled traders, whilst the German GlüStV permits trading up to €1,500 (approximately £1,275) without full KYC verification on certain prediction markets, though individual jurisdiction rules vary. Confirmation of final lineups typically occurs 24 hours before first pitch, providing a final data point before market settlement.

Methodology

We track Milwaukee Brewers vs. Houston Astros 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Tax 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?

Polymarket Tax 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within 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.