Live prediction market odds for St. Louis Cardinals vs. Houston Astros (7:10 PM ET). Compare prices across Kalshi and Polymarket and ProphetX.
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MARKET RESOLVEDKalshi / Polymarket / ProphetX
Resolved 2026-04-18
This market resolved on 2026-04-18. St. Louis Cardinals was the officially declared outcome. Prior to resolution, the market peaked at 98%.
St. Louis Cardinals vs. Houston Astros (7:10 PM ET) — MLB game held on 2026-04-18. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
| Candidate |  |  |  |
|---|---|---|---|
St. Louis CardinalsWINNER | 99% | 57% | 98% |
Houston Astros | 1% | 43% | 8% |
St. Louis Cardinals vs. Houston Astros (7:10 PM ET) was a prediction market event tracked across 3 platforms (Kalshi, Polymarket, ProphetX). St. Louis Cardinals led the market at 85% implied probability before resolution. Other contenders include Houston Astros at 17%.
St. Louis Cardinals held the lead at 85% implied probability heading into resolution. Behind St. Louis Cardinals, Houston Astros at 17% were the next closest contenders. The 42.0% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.
Here were the closing odds across Kalshi, Polymarket, ProphetX: St. Louis Cardinals: 99¢ on Kalshi, 57¢ on Polymarket, 98¢ on ProphetX. Houston Astros: 1¢ on Kalshi, 43¢ on Polymarket, 8¢ on ProphetX. The 42.0% spread across platforms highlights where markets disagreed — a gap traders can exploit by buying low on one platform and selling high on another.
A price of 85¢ meant the market estimated a 85% chance that St. Louis Cardinals would be the outcome. Traders who bought at 85¢ and held through resolution received $1.00 per share — a 18% return on their position. Those on the wrong side received $0.
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Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket and ProphetX.
KalshiIf Houston wins the St. Louis vs Houston professional baseball game originally scheduled for Apr 18, 2026 at 7:10 PM EDT, then the market resolves to Yes.
The following market refers to the St. Louis vs Houston professional baseball game originally scheduled for Apr 18, 2026 at 7:10 PM EDT. If this game is postponed or delayed, the market will remain open and close after the rescheduled game has finished (within two days). If the game is cancelled or rescheduled to over two days away, the market will resolve to a fair price in accordance with the rules.
PolymarketIn the upcoming MLB game between the St. Louis Cardinals and Houston Astros, scheduled for April 18 at 7:10PM ET: This market will resolve to "St. Louis Cardinals" if the St. Louis Cardinals win the game. This market will resolve to "Houston Astros" if the Houston Astros win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
ProphetXSports moneyline - resolves based on official game outcome per ProphetX Prediction Rules
St. Louis Cardinals
84.6% avg
