Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Bot UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| O/U 0.5 | 100% |
| O/U 1.5 | 100% |
| 1st Half O/U 0.5 | 100% |
| CR Vasco da Gama O/U 0.5 | 100% |
| CR Vasco da Gama 1st Half O/U 0.5 | 100% |
| 2nd Half O/U 0.5 | 100% |
| CR Vasco da Gama O/U 1.5 | 99% |
| CR Vasco da Gama 2nd Half O/U 0.5 | 99% |
| Fluminense FC O/U 0.5 | 60% |
| CR Vasco da Gama O/U 2.5 | 55% |
| Fluminense FC O/U 1.5 | 50% |
| Fluminense FC O/U 2.5 | 50% |
| Both Teams to Score in Second Half | 50% |
| 2nd Half O/U 1.5 | 50% |
| 2nd Half O/U 2.5 | 50% |
| Fluminense FC 2nd Half O/U 0.5 | 50% |
| Fluminense FC 2nd Half O/U 1.5 | 50% |
| CR Vasco da Gama 2nd Half O/U 1.5 | 50% |
| O/U 2.5 | 49% |
| O/U 5.5 | 38% |
| CR Vasco da Gama (-1.5) | 32% |
| Both Teams to Score | 32% |
| O/U 3.5 | 25% |
| O/U 4.5 | 24% |
| CR Vasco da Gama (-2.5) | 9% |
| Fluminense FC (-1.5) | 1% |
| Fluminense FC 1st Half O/U 0.5 | 1% |
| Fluminense FC 1st Half O/U 1.5 | 1% |
| CR Vasco da Gama 1st Half O/U 1.5 | 1% |
| Fluminense FC (-2.5) | 0% |
| Both Teams to Score in First Half | 0% |
| 1st Half O/U 1.5 | 0% |
| 1st Half O/U 2.5 | 0% |
Market context
Fluminense and Vasco da Gama met in the Copa do Brasil at the Maracanã on 1 August 2026, with the match finishing 0-0 after 90 minutes, which shows how tight these Rio derby ties can be when the sides are well matched.[2] Their December 2025 semi-final was also decided only on penalties after a 1-1 second-leg result, and Vasco advanced 4-3 from the shootout, so historical near-parity is a better guide than a simple win/loss split.[3] Head-to-head data across recent seasons also points to a balanced fixture, with modest edges changing hands rather than one team imposing a stable advantage.[7][15]
For a market priced at 1% YES, the practical read is that “more markets” outcomes often need a specific in-play pattern, not just a narrow overall contest. A programmatic trader would treat this as a sparse-event price: compare the stated settlement rule with the live match state, then only update exposure when the underlying condition becomes mechanically plausible, such as a late tactical shift, a red card, or a line-up change that alters second-half shot volume.[20] The 5 August cup schedule and 6 August settlement window also mean late official confirmation matters more than usual if the fixture timing or completion status moves.[20]
The catalysts to watch are the same ones that affect bot-driven execution: official team news, starting XIs, referee assignment, substitution patterns, and any schedule change that pushes the match beyond the expected window.[2][13] Copa do Brasil ties can remain low-scoring and then flip late, so conditional orders usually make more sense than chasing the headline price after kick-off; the edge, if any, tends to come from reacting to the first verified event rather than pre-match noise.[2][20]
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
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
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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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