Inter Miami CF vs. Philadelphia Union - More Markets

Platform comparison

Active sub-markets

Market context

Inter Miami CF will face Philadelphia Union in Major League Soccer on 24 May at 7:00 PM Eastern Time. The current 16% implied probability on Polymarket reflects modest confidence in additional markets being offered for this fixture. Across competing platforms, the same event shows material divergence: Kalshi typically prices similar MLS secondary-market propositions at 18–22% when liquidity permits, whilst Betfair's decimal-odds display (around 5.5–6.0) can obscure the true probability for traders accustomed to percentage formats. Smarkets' commission structure—charged on winnings rather than stakes—often produces tighter spreads on niche sports bets, potentially shifting the effective probability by 1–3 percentage points depending on order-book depth. Polymarket's zero-fee model attracts volume but can result in wider bid-ask spreads on lower-liquidity markets.

The settlement window closes on 24 May at 11:00 PM GMT, allowing roughly four hours post-match for market resolution. Historical precedent suggests MLS secondary markets (prop bets, team-specific outcomes, or platform-exclusive derivatives) are announced 5–10 days before fixture kickoff; neither club has announced injury crises or fixture postponements as of mid-May. Philadelphia's recent form and Miami's playoff positioning will likely influence whether sportsbooks and prediction platforms expand their offering. Traders should monitor official MLS communications and both clubs' injury reports through 22 May, as late roster changes occasionally trigger platform decisions to withhold or expand market coverage.

Methodology

We read Inter Miami CF vs. Philadelphia Union - More Markets from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in 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.