Phoenix Mercury vs. Chicago Sky

Platform comparison

Market context

The Phoenix Mercury meet the Chicago Sky in a WNBA game scheduled for 3 August at 9:00 pm ET, and this market will resolve to the side that wins on the final score, including overtime. In prediction markets, a **YES** share pays out if the named outcome happens and a **NO** share pays out if it does not, so a 55% crowd-implied probability means traders are collectively pricing the Mercury as a slight favourite.[4]

Recent meetings suggest this is a competitive matchup rather than a one-sided spot. The teams split their two regular-season meetings before this game: Phoenix won 91-83 in May, while Chicago won 77-66 in July.[2][7] That kind of back-and-forth record helps explain why a mid-50s probability looks plausible rather than extreme; the market is not pricing a runaway edge, just a modest tilt based on form and matchup history.[2][7][16]

The main trading catalysts are simple but important: the confirmed tip-off, any late injury or starting-line-up news, and whether either side arrives on a scheduling edge from the preceding games. ESPN listed the game on its live scoreboard page with Phoenix at 11-19 and Chicago at 11-18 in the posted matchup context, while Yahoo’s preview highlighted Chicago’s recent 84-83 win over the Aces and Phoenix’s 11-19 record heading in.[4][11] If the game is postponed, the market stays open until it is completed; if it is cancelled with no make-up date, it resolves 50-50 under the market rules.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK 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.