NBA Summer League: Boston Celtics vs. Charlotte Hornets

Platform comparison

Market context

The Boston Celtics have already defeated the Charlotte Hornets 89–84 in the NBA Summer League game scheduled for 5:00PM ET on 12 July at Cox Pavilion in Las Vegas, confirming the outcome before the settlement window closes[1]. This result explains the 100% YES crowd-implied probability for the Celtics winning, as the event has physically concluded with a definitive final score including no overtime extension[1][2].

Historically, Summer League markets with 100% implied probability post-game resolution are rare anomalies where trading halts entirely once the scoreboard locks, unlike regular-season contests where late-game volatility can shift odds minutes before settlement. In comparable Las Vegas Summer League cases, once a team secures a five-point lead with under two minutes remaining, markets freeze at full certainty, mirroring today’s static pricing where no further price discovery occurs[1][2].

Traders should monitor the official NBA settlement feed for any rare postponement clauses, though the game is confirmed complete with no make-up scenario needed[1]. The only dependency remaining is the formal resolution timestamp on 12 July at 21:00 UTC, which will lock the market to “Boston Celtics” based on the 89–84 final[1]. No new announcements, roster changes, or schedule shifts will alter this outcome, as the contest has finished and the score is final[2][7].

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

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 Today. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.