Houston Astros vs. Chicago Cubs

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Active sub-markets

Market context

The Houston Astros are set to face the Chicago Cubs at Wrigley Field, with Chicago priced as a clear home favourite and the market implying just 42% for Houston. ESPN’s game page has the Cubs around -144 and shows the clubs arriving in very different form: Houston are 20-31 overall and 8-17 on the road, while Chicago are 29-21 and 18-8 at home. That gap matters in baseball, where home field, bullpen usage and line-up depth can swing short series much more than season records alone.

For context, a 42% price is broadly consistent with an underdog on the road against a stronger home side, rather than a true long shot. Comparable MLB markets tend to move most sharply when the starting pitcher is confirmed, or if there is a late scratch that changes the batting order and bullpen plan. Baseball Savant’s preview and the ESPN matchup page are the key reference points here, because the main catalyst is not a wider trend but the day-of game-state information that can shift win probability quickly.

Traders should watch for the final line-ups, any change to the scheduled 2:20 pm ET first pitch, and whether weather at Wrigley affects play. If this game is postponed, the market remains open until it is completed; if there is a make-up date, that would preserve the settlement path. A cancellation with no make-up, or a tie, would force a 50-50 result, but the live focus remains on whether Chicago can turn its stronger home record into a result against an Astros side that has struggled away from Houston.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Houston Astros vs. Chicago Cubs across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. PolyGram routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

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.

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 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 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.