Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
50% | 50% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
50% | 50% | 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 → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Ravens O/U 17.5 | 50% |
| Eagles O/U 19.5 | 50% |
| Ravens O/U 16.5 | 50% |
| Eagles O/U 20.5 | 50% |
| Eagles vs. Ravens | 27% |
| Spread -1.5 | 22% |
| Spread -2.5 | 19% |
| Spread -3.5 | 15% |
| O/U 36.5 | 11% |
| 1H Spread -2.5 | 10% |
| 1H O/U 19.5 | 10% |
| 1H Moneyline | 10% |
| O/U 37.5 | 9% |
| Spread -4.5 | 9% |
| 1H Spread -3.5 | 9% |
Market context
The Philadelphia Eagles and Baltimore Ravens meet in an NFL preseason fixture on 15 August at 7:00 PM ET. The market currently prices Eagles victory at 27%, implying roughly 73% probability for a Ravens win. Settlement occurs in USDC at market close, with tie or cancellation triggering a 50-50 split and postponement keeping the contract open until completion.
Preseason matchups carry structural unpredictability that distinguishes them from regular-season contests. Historical data shows that crowd-implied probabilities in August NFL games often compress around home-field advantage and recent roster composition rather than full-strength performance metrics. The Ravens' 27% underdog positioning reflects their status as the visiting team, though preseason rosters differ substantially from those deployed in September. Comparable August contests between division rivals typically see probability swings of 10–15 percentage points once injury reports and starter participation become public in the 48 hours before kickoff. The current 73-point spread favouring Baltimore suggests market participants are weighting recent Ravens momentum or Eagles injury concerns, though preseason samples remain thin for reliable inference.
Traders should monitor official injury reports released by both franchises, typically published Wednesday and Thursday before Sunday games. Confirmation of whether each team's starting quarterback and primary offensive weapons will see playing time materially reshapes preseason expectations; starters often sit entirely in early August contests. Recent NFL scheduling announcements and any weather alerts for Philadelphia should be tracked via official NFL sources. Funding rates on related sports derivatives across major crypto exchanges may signal sharp money repositioning if material roster news emerges. The settlement window closes at 23:00 UTC on 15 August, leaving minimal post-game arbitrage window for on-chain settlement.
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $118K.
Methodology
This page reads Eagles vs. Ravens 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.
UK Frequently Asked Questions
- 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.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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