Phoenix Mercury vs. Chicago Sky

Platform comparison

Market context

Phoenix Mercury play the Chicago Sky in Chicago, with the market’s 55% YES price implying the Mercury are only a modest favourite despite their stronger recent head-to-head edge. Phoenix have already beaten Chicago twice this year, 108-104 in April and 91-83 in May, while Chicago’s one recent win in the series came on 7 July, 77-66, so the matchup has not been one-way even with Phoenix holding the more successful overall profile in the comparison set.[2][3][8] That makes the current crowd number look broadly consistent with a near coin-flip road game rather than a heavy favourite, especially given that the teams’ recent form has also been mixed, with Phoenix coming in off a two-game winning streak in the latest listed results and Chicago also arriving on the back of a win.[13][11]

For traders, the main catalysts are the final injury and availability updates, the confirmed tip time, and whether the game proceeds as scheduled, because postponement keeps the market open until completion while cancellation would settle 50-50. ESPN’s live game listing shows Phoenix at 11-19 and Chicago at 11-18, which helps explain why analysts and models are likely to cluster close to the market rather than around a much larger gap.[1][11] Chicago’s home form matters as well: the Sky are listed at 7-7 at home in the pre-game context, so any late movement should be watched alongside cross-platform pricing from books and consensus previews, where the edge may shift quickly if one side’s status changes before the 9 p.m. ET start.[11]

Sources: 1 · 2 · 3 · 4 · 5

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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.

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.