Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
0% | 100% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Market context
The Boston Celtics face the Atlanta Hawks in an NBA Summer League fixture on 13 July at 6:00 PM ET. Summer League contests serve as evaluation platforms for draft picks, two-way players, and roster hopefuls rather than competitive fixtures with playoff implications. The Celtics, as defending NBA champions, typically field a lighter Summer League roster focused on development of younger talent, whilst the Hawks use the tournament to assess depth and integration of recent acquisitions. Settlement occurs in USDC at market close on 13 July at 22:00 UTC, with the contract resolving to either team name based on final score including overtime.
The 0% implied probability for Boston reflects the structural disadvantage of Summer League prediction markets: sparse historical data, minimal media coverage of lineups, and frequent late roster adjustments. Comparable Summer League markets have historically shown high volatility in the final hours before tip-off, particularly when injury updates or coaching decisions alter expected playing time for key evaluation targets. Teams often rest or withdraw players without formal announcement, creating information asymmetry that depresses confidence in pre-game probabilities.
Traders should monitor official NBA and team social media channels through 12 July for roster confirmations, as Summer League squads shift regularly. The Hawks' recent draft activity and the Celtics' depth chart decisions will influence which players see meaningful minutes. Fixture scheduling and venue conditions—Summer League games occur in Las Vegas—rarely affect outcomes materially, but weather-related postponements remain possible under the contract's terms. Funding rates on major spot exchanges show typical summer liquidity patterns with no material BTC or ETH correlation to basketball outcomes.
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $238K.
Methodology
This page reads NBA Summer League: Boston Celtics vs. Atlanta Hawks on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
FAQ
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
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