Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
76% | 24% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
76% | 24% | 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: Arthur Fils vs Cameron Norrie Set 1 O/U 8.5 | 76% |
| National Bank Open: Arthur Fils vs Cameron Norrie | 70% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set 1 Winner | 66% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set 2 Winner | 64% |
| National Bank Open: Arthur Fils vs Cameron Norrie Match O/U 21.5 | 53% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set 2 O/U 8.5 | 51% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set 2 O/U 9.5 | 51% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set 1 O/U 9.5 | 51% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set 2 O/U 10.5 | 51% |
| Completed Match | 50% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set Handicap +/-1.5 | 46% |
| National Bank Open: Arthur Fils vs Cameron Norrie Match O/U 22.5 | 45% |
| National Bank Open: Arthur Fils vs Cameron Norrie Match O/U 23.5 | 41% |
| National Bank Open: Arthur Fils vs Cameron Norrie Total Sets: O/U 2.5 | 37% |
| National Bank Open: Arthur Fils vs Cameron Norrie Set 1 O/U 10.5 | 28% |
Market context
Arthur Fils and Cameron Norrie are set for a National Bank Open meeting in Montréal, with the market priced at 69% for Fils. The main reason that leans the market towards Fils is the broader form split: season-by-season comparators put Fils ahead on 2026 results, while Norrie’s numbers are steadier but less explosive, which fits a price that favours the younger, higher-ranked player without making it a near-lock.[14][15][16]
There is no established head-to-head to anchor the matchup, so traders are reading a first-time pairing through current-level indicators rather than prior direct evidence.[4][7][17] That tends to make the market more sensitive to short-run form and surface-specific results: hard-court records in the comparison tables are closer than the outright price suggests, which is the main historical check on assuming the favourite is dominant.[1][8][14]
The immediate catalyst is the match itself, but the key trading inputs are the confirmed schedule, any late order-of-play changes, and whether either player arrives with a physical issue or a walkover chain elsewhere in the draw. Tennis.com lists the fixture for Round 4 in Montréal, while ATP and live-score listings are the cleanest sources for any change to start time, retirement, or non-completion risk, all of which matter because an unfinished match can still resolve through advancement rules or drop to 50-50 if it is not concluded in time.[10][12][15]
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: Arthur Fils vs Cameron Norrie 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
- 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 political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- Why do Polymarket and Kalshi differ on elections?
- Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.
- 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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