Philadelphia Phillies vs. St. Louis Cardinals

Platform comparison

Market context

The Philadelphia Phillies face the St. Louis Cardinals on 10 August at 7:45PM ET in a regular-season Major League Baseball fixture. The market currently reflects a 53% implied probability of a Phillies victory, suggesting near-parity between the two franchises for this single-game outcome. Resolution depends on the official final statistics; should the match be postponed, the market remains open until completion, whilst cancellation or a tied result would trigger a 50-50 split resolution by 17 August.

Comparable regular-season matchups between these National League Central rivals historically show competitive balance, though the Phillies have maintained a stronger overall record in recent seasons. The Cardinals' recent performance trajectory and roster composition relative to Philadelphia's current form provide the baseline for assessing the 53% probability. Seasonal records, recent win-loss streaks, and head-to-head records from the current campaign inform how traders should contextualise this near-even split.

Key variables affecting the outcome include confirmed starting pitcher assignments, injury status of key position players, and recent offensive and defensive metrics for both teams. Traders should monitor official MLB announcements regarding roster changes or weather conditions that might affect play in the days preceding the fixture. The settlement window extends to 23:45 on 17 August, providing sufficient time for any postponed game to be rescheduled and completed. Recent team performance data from MLB.com and ESPN will offer the most current information on form and availability.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Philadelphia Phillies vs. St. Louis Cardinals plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

UK Frequently Asked Questions

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.