Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
53% | 47% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
53% | 47% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on PolyGram → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on PolyGram → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on PolyGram → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on PolyGram → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on PolyGram.
Active sub-markets
| Victor Wembanyama: Points O/U 24.5 | 53% YES | 48% NO |
| Jalen Williams: Points O/U 17.5 | 53% YES | 48% NO |
| Spread -14.5 | 28% YES | 73% NO |
| Spread -11.5 | 35% YES | 66% NO |
| Spread -8.5 | 45% YES | 56% NO |
| Spread -5.5 | 56% YES | 44% NO |
Market context
San Antonio and Oklahoma City play Game 2 of the Western Conference Finals in Oklahoma City, with the Spurs leading the series 1-0 and the market currently pricing a narrow Thunder edge. That kind of mid-series price is common when the home team has the better regular-season record, but the opening game result has already shifted expectations away from a straightforward home-court line. In these NBA playoff markets, the YES price tends to firm when fresh money arrives quickly after late withdrawals settle, especially where the on-ramp is smooth: card deposits and bank transfers can move the line faster than slower rails, while SEPA and USDC balances often support larger, more immediate orders once funds are already in the account.
Comparable playoff games with a one-game series lead usually trade as a test of whether the market is leaning on venue and depth or on the first result. ESPN’s pre-game listing has Oklahoma City around -7.5, while other books cited in recent previews have moved between Thunder -5.5 and -6.5, with totals around 216-221.5. That range suggests the market is not treating Game 1 as a fluke, but it is also not fully discounting the Spurs’ ability to keep this close. A 53% implied YES is therefore consistent with a mild favourite rather than a strong one, and it leaves room for price movement if funding inflows widen participation.
The main catalysts are roster news, confirmed starters, and any change to the betting market’s consensus line before tip-off at 8:30pm ET. CBS Sports noted the Thunder as 6.5-point favourites with an Under lean in its model, which matters because sharp pre-match money often arrives after deposits clear on easier rails and after withdrawal timing from earlier sessions has reset balances. If the market sees a late injury update or a move in the live sportsbook spread, liquidity can deepen quickly; if not, the price should mostly track the pre-game number and the usual playoff home-court premium.
Methodology
We track Spurs vs. Thunder on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
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.
- 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.
- What does it cost to trade on PolyGram?
- Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- 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.
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