Philadelphia Union vs. Inter Miami CF

Platform comparison

Market context

Philadelphia Union will host Inter Miami CF on Wednesday, 19 August 2026 in a regular-season Major League Soccer fixture. The 42% implied probability on this contract reflects a slight lean towards a Miami victory or draw, with the Union given less than even odds to win at home. Settlement occurs at the final whistle, with the YES outcome triggered only by a Philadelphia victory.

Historical matchups between these sides show competitive balance, though Miami has strengthened considerably since their 2020 expansion. The Union's home record at Subaru Park typically favours the hosts, with Philadelphia winning roughly 55–60% of regular-season matches there over the past three seasons. However, Miami's investment in attacking talent—particularly following their 2023 Messi period—has elevated their road performance. The current 42% YES probability sits below typical home-team backing in MLS, suggesting the market has priced in Miami's improved competitive standing relative to historical norms.

Traders should monitor team news releases for injury updates to key players, particularly any absences among Philadelphia's midfield or Miami's attacking unit. Fixture congestion matters: both sides may have continental commitments in the days preceding or following this match, potentially affecting squad rotation decisions. Recent form in July and early August will provide the clearest signal; a team entering the fixture on a winning streak typically sees their win probability rise 5–8 percentage points. Comparison with major sportsbooks (DraftKings, FanDuel, BetMGM) will reveal whether the 42% prediction-market price represents genuine value or reflects consensus uncertainty about squad availability closer to kick-off.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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'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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.