Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Market UK) Pick polygram.ink (preferred broker) |
66% | 34% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
66% | 34% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Spread -1.5 | 66% |
| O/U 42.5 | 51% |
| Vikings O/U 21.5 | 50% |
| Giants O/U 18.5 | 50% |
| Giants O/U 19.5 | 50% |
| Vikings O/U 19.5 | 50% |
| Giants O/U 20.5 | 50% |
| Vikings O/U 20.5 | 50% |
| 1H O/U 21.5 | 50% |
| Vikings O/U 22.5 | 50% |
| 1H Spread -0.5 | 50% |
| 1H Moneyline | 50% |
| Vikings vs. Giants | 28% |
| O/U 38.5 | 27% |
| Spread -1.5 | 26% |
| Spread -2.5 | 24% |
| Spread -3.5 | 20% |
| O/U 40.5 | 17% |
| O/U 41.5 | 17% |
Market context
The Minnesota Vikings will face the New York Giants in an NFL preseason game on 15 August 2026 at 1:00 PM Eastern Time. A YES share in this market represents a bet that the Vikings will win; a NO share represents a bet that the Giants will win. The current crowd-implied probability of 28% for a Vikings victory reflects the market's assessment that the Giants are favoured. Settlement occurs immediately after the final whistle, unless the fixture is postponed, in which case the market remains open until completion. A cancelled game or tie would resolve both outcomes at 50–50.
Preseason matchups carry different weight than regular-season contests when evaluating historical records. Teams often field reserve lineups and rotate players extensively to assess depth and development, making traditional head-to-head records less predictive. The Vikings have won their last three preseason encounters against the Giants (2019, 2015, 2011), yet preseason form rarely correlates with autumn performance. The current 28% probability suggests traders are pricing in factors beyond historical precedent—likely roster composition, coaching priorities, or injury status entering the fixture.
Key variables to monitor include official injury reports released in the week before the game, particularly for either team's starting quarterback or defensive anchors. Coaching staff statements about player rotation and game plan intensity can signal whether teams intend competitive play or prioritise development work. Weather conditions on game day—temperature, wind, precipitation—may influence offensive execution, especially if either side relies on passing efficiency. Any last-minute schedule changes or venue adjustments would be announced through official NFL channels and would reset market expectations materially.
Live Data & Statistics
Live stats load when the match begins. Current market odds are shown above. Trading volume: $152K.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Market UK, which mirrors the Polymarket order book directly.
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.
UK Frequently Asked Questions
- 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.
- 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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