Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
72% | 28% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
72% | 28% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| National Bank Open: Valentin Royer vs Tommy Paul Set 1 O/U 8.5 | 72% |
| National Bank Open: Valentin Royer vs Tommy Paul Set Handicap +/-1.5 | 57% |
| Completed Match | 50% |
| National Bank Open: Valentin Royer vs Tommy Paul Set 2 O/U 8.5 | 50% |
| National Bank Open: Valentin Royer vs Tommy Paul Set 2 O/U 9.5 | 50% |
| National Bank Open: Valentin Royer vs Tommy Paul Set 2 O/U 10.5 | 50% |
| National Bank Open: Valentin Royer vs Tommy Paul Match O/U 21.5 | 48% |
| National Bank Open: Valentin Royer vs Tommy Paul Match O/U 22.5 | 44% |
| National Bank Open: Valentin Royer vs Tommy Paul Match O/U 23.5 | 40% |
| National Bank Open: Valentin Royer vs Tommy Paul Set 1 O/U 9.5 | 39% |
| National Bank Open: Valentin Royer vs Tommy Paul Total Sets: O/U 2.5 | 33% |
| National Bank Open: Valentin Royer vs Tommy Paul Set 1 Winner | 25% |
| National Bank Open: Valentin Royer vs Tommy Paul Set 1 O/U 10.5 | 25% |
| National Bank Open: Valentin Royer vs Tommy Paul Set 2 Winner | 23% |
| National Bank Open: Valentin Royer vs Tommy Paul | 18% |
Market context
Traders on decentralised prediction markets give 72% probability to national bank open: valentin royer vs tommy paul. This market refers to the tennis match between Valentin Royer and Tommy Paul in the National Bank Open, originally scheduled for August 6, 2026 at 10:00AM ET. This market will resolve to 'Valentin Ro…
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for National Bank Open: Valentin Royer vs Tommy Paul plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
UK Frequently Asked Questions
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- Can prediction markets influence election outcomes?
- Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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