Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Bot UK) Pick polygram.ink (preferred broker) |
93% | 7% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
93% | 7% | 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 | 93% |
| CA River Plate O/U 0.5 | 90% |
| 2nd Half O/U 0.5 | 80% |
| O/U 1.5 | 73% |
| CA River Plate 2nd Half O/U 0.5 | 72% |
| 1st Half O/U 0.5 | 65% |
| CA River Plate O/U 1.5 | 63% |
| CA River Plate 1st Half O/U 0.5 | 58% |
| CA River Plate (-1.5) | 52% |
| Independiente Santa Fe 2nd Half O/U 1.5 | 50% |
| O/U 2.5 | 47% |
| 2nd Half O/U 1.5 | 44% |
| CA River Plate O/U 2.5 | 36% |
| CA River Plate 2nd Half O/U 1.5 | 35% |
| Independiente Santa Fe O/U 0.5 | 33% |
| Both Teams to Score | 30% |
| CA River Plate (-2.5) | 28% |
| 1st Half O/U 1.5 | 27% |
| O/U 3.5 | 25% |
| Independiente Santa Fe 2nd Half O/U 0.5 | 23% |
| CA River Plate 1st Half O/U 1.5 | 19% |
| 2nd Half O/U 2.5 | 18% |
| Independiente Santa Fe O/U 2.5 | 17% |
| Independiente Santa Fe 1st Half O/U 0.5 | 16% |
| Both Teams to Score in Second Half | 16% |
| O/U 4.5 | 10% |
| Both Teams to Score in First Half | 9% |
| 1st Half O/U 2.5 | 8% |
| Independiente Santa Fe O/U 1.5 | 6% |
| O/U 5.5 | 4% |
| Independiente Santa Fe (-1.5) | 1% |
| Independiente Santa Fe 1st Half O/U 1.5 | 1% |
| Independiente Santa Fe (-2.5) | 0% |
Market context
River Plate and Independiente Santa Fe are due to meet in the Copa Sudamericana Round of 16 second leg at the Estadio Más Monumental in Buenos Aires after a goalless first leg in Bogotá, with the tie still level and the winner set to advance to the quarter-finals. The match was confirmed for 26 August at 21:30 local time in Argentina, which places it inside the market’s settlement window and leaves any late change to the fixture highly relevant for “more markets” resolution. [3][4]
For a history-based read, the 0-0 first leg is the key comparator: low-scoring first legs in two-legged CONMEBOL ties often push attention onto derivatives rather than the main result, because the return leg can open up if either side needs to chase the aggregate. River’s home leg also carries the usual Monumental premium, while Santa Fe’s away setup and the altitude-free environment are a different game-state from Bogotá, where the first match stayed tight throughout. [1][3][11]
For a programmatic trader, the main catalysts are the confirmed line-up, referee and VAR assignments, any late medical or suspension news, and whether the fixture proceeds on schedule without postponement or abandonment. A clean way to automate around this market is to key off official competition updates and match-centre state changes, then only fire conditional orders once the match is live and the event feed confirms the legs, because “more markets” outcomes often depend on whether the book of side markets is created, listed, or voided before settlement. [3][4][6]
Methodology
We track CA River Plate vs. Independiente Santa Fe - More Markets across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
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'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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