PortlandFire vs. Chicago Sky

Platform comparison

Active sub-markets

Market context

The underlying real-world event is the WNBA match between the Portland Fire and the Chicago Sky, played on 26 June 2026 at Wintrust Arena, where the Chicago Sky secured a decisive 124–94 victory. Kamilla Cardoso delivered a historic performance, scoring 30 points on 13-for-13 shooting, a WNBA-record efficiency night that cemented the Sky’s dominance [3][6]. This result fully explains the current crowd-implied probability of 0% for a Portland Fire win, as the game has already concluded with an unambiguous outcome.

Historically, similar markets where one team dominates by 30 points or more resolve instantly, with no ambiguity or delay, mirroring how this market closed immediately post-game [2]. Comparable cases in WNBA prediction markets show that when a star player achieves record-setting efficiency, the implied probability for the opposing team collapses to zero within minutes, reflecting the certainty of the result [3]. This pattern confirms that the 0% probability is not a speculative estimate but a factual reflection of the completed game.

Traders should monitor official WNBA announcements regarding future scheduling dependencies, though no further action is needed for this settled market. Recent coverage from ESPN confirms the final score and highlights, providing definitive closure to the event [1][2]. For platform comparisons, Polymarket resolves such markets using decimal odds and low fees with minimal KYC, whereas Kalshi employs implied probabilities, stricter KYC, and higher regulatory oversight, while Betfair and Smarkets use decimal odds with varying fee structures and KYC reach, diverging notably in how they handle post-game settlements [1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read PortlandFire vs. Chicago Sky 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

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

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.