Connecticut Sun vs. Phoenix Mercury

Platform comparison

Market context

On 19 July 2026, the Connecticut Sun and Phoenix Mercury will face off in a WNBA regular-season match at 7:00PM ET, with the winner determined by the final score including any overtime. In prediction markets, a YES share pays out if the market’s condition is met—here, if the Phoenix Mercury win—while a NO share pays out if they do not, meaning the Connecticut Sun win or the game is cancelled without a make-up. The current crowd-implied probability of a Mercury win sits at 0% YES, suggesting the crowd heavily favours the Sun.

Historically, such extreme probabilities often shift before game time if new information emerges, such as lineup changes or injury reports. In the 2025 matchup on 18 June, the Mercury defeated the Sun 83–75, with Alyssa Thomas and Satou Sabally leading Phoenix [4]. However, projections for the upcoming game have the Mercury as favourites, expecting an 83.5–79.0 result, which contrasts sharply with the market’s current pricing [3]. This divergence highlights how crowd sentiment can lag behind analytical forecasts.

Traders should monitor official WNBA injury reports and starting lineup announcements before the game, as these are the primary catalysts that could alter the probability. Any delay or postponement will keep the market open until completion, while a full cancellation without a make-up game resolves the market at 50–50. With the settlement window ending on 19 July 2026 at 23:00 UTC, timely updates from team sources or league channels will be critical for assessing whether the 0% probability is justified or mispriced.

Sources: 1 · 2 · 3 · 4

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.