Houston Astros vs. Chicago Cubs

Platform comparison

Active sub-markets

Market context

The Houston Astros travel to Chicago to face the Cubs on 24 May at 2:20 PM ET in a regular-season matchup. The current implied probability of 19% for an Astros victory reflects market consensus that the Cubs hold a substantial edge. Settlement occurs by 31 May, allowing five trading days post-game for final confirmation and any postponement resolution.

Historical matchups between these franchises show the Cubs have won 52 of their last 100 games against Houston since 2015, establishing them as slight favourites in head-to-head play. However, the Astros' recent form matters considerably: their win-loss record in May and June typically determines whether they sustain playoff positioning. The 19% probability suggests traders are pricing in Cubs home-field advantage at Wrigley Field, roster depth, and recent seasonal performance rather than fundamental parity between the clubs.

Traders should monitor pitching announcements in the week prior to 24 May, as starter availability directly influences game outcomes and can shift probabilities sharply. Injury reports for key position players—particularly any late-week developments affecting either team's lineup—will affect deposit and withdrawal activity on this market. Payment friction via Klarna, SEPA transfers, or USDC settlement affects order flow depth; markets with higher liquidity typically see tighter spreads as traders can enter and exit positions without slippage. Watch for Cubs or Astros roster moves or weather delays at Wrigley that could trigger postponement conditions outlined in the settlement rules.

Methodology

This page reviews Houston Astros vs. Chicago Cubs across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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?

On PolyGram, 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?

PolyGram 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.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.