NBA Summer League: Toronto Raptors vs. Boston Celtics

Platform comparison

Market context

The Boston Celtics defeated the Toronto Raptors 83–80 in their NBA Summer League clash on Friday, 10 July 2026, a result now settled in Las Vegas. With the game completed, the prediction market titled “NBA Summer League: Toronto Raptors vs. Boston Celtics” has effectively resolved, despite its settlement window extending to 11 July 2026. The crowd-implied probability of 0% YES for a Raptors win aligns precisely with the final score, confirming Boston as the victor including no overtime.

Historically, Summer League outcomes often diverge from regular-season expectations, yet when a game finishes before the settlement deadline, prediction markets typically mirror sportsbook closures instantly. In comparable 2024 and 2025 Summer League contracts, markets with 0% implied probability for the losing side resolved within minutes of the final whistle, with no late liquidity shifts. The divergence here is minimal: sportsbooks closed the Raptors at +120, while the prediction market’s 0% probability reflects the certainty of the result, matching analyst consensus that Boston’s deeper roster would prevail in a low-scoring affair.

Traders should note the game’s official time change announcement, which shifted the start from 9:00PM ET to an earlier slot, potentially affecting live betting liquidity before the final score emerged [8]. No further catalysts remain, as the result is determined by the final score including any overtime, and the game was not postponed or canceled. With the outcome confirmed, the market’s 50–50 cancellation clause is irrelevant, and the settlement is straightforward.

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Methodology

We track NBA Summer League: Toronto Raptors vs. Boston Celtics across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 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.

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.