New York Liberty vs. Chicago Sky

Platform comparison

Market context

The New York Liberty are scheduled to visit the Chicago Sky at Wintrust Arena on 18 August at 9:00 p.m. ET, and prediction-market shares on this kind of event are a simple way to express a view on one specific outcome: a YES share pays out if the named team wins, while a NO share pays if the other team wins. With the crowd pricing the Liberty side at 66%, the market is signalling that New York are the more likely winner, though not a certainty.

That sort of probability is usually read against the teams’ recent form and the market’s own expectation of margin, not as a forecast of a blowout. Pre-game listings pointed to the Liberty as clear favourites, with moneyline and spread prices broadly in line with a mid-60s win chance, which fits a 66% implied probability. The game was also being framed around New York’s stronger record and Chicago’s weaker season, so the current price is consistent with a favourite expected to win more often than not, but still leave room for an upset.

For traders, the key catalysts are straightforward: confirm the game actually starts and stays on schedule, watch for late injury updates, and note whether any postponement or cancellation changes the settlement rules. Recent coverage said Sabrina Ionescu was cleared to return for the Liberty, while Satou Sabally and Leonie Fiebich remained out, which matters because late absences can move win probabilities quickly. If the game is postponed, the market stays open until completion; if it is cancelled outright with no make-up date, it resolves 50-50.

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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.

UK Frequently Asked Questions

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.