Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
92% | 8% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
92% | 8% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| O/U 0.5 | 92% |
| SE Palmeiras O/U 0.5 | 88% |
| 2nd Half O/U 0.5 | 80% |
| SE Palmeiras 1st Half O/U 0.5 | 77% |
| O/U 1.5 | 69% |
| 2nd Half O/U 1.5 | 67% |
| 1st Half O/U 0.5 | 62% |
| SE Palmeiras O/U 1.5 | 60% |
| Both Teams to Score in Second Half | 56% |
| Club Cerro Porteño 1st Half O/U 1.5 | 50% |
| 2nd Half O/U 2.5 | 50% |
| SE Palmeiras 2nd Half O/U 0.5 | 50% |
| SE Palmeiras 2nd Half O/U 1.5 | 50% |
| Club Cerro Porteño 2nd Half O/U 0.5 | 50% |
| Club Cerro Porteño 2nd Half O/U 1.5 | 50% |
| SE Palmeiras (-1.5) | 47% |
| Club Cerro Porteño O/U 2.5 | 43% |
| O/U 2.5 | 42% |
| Club Cerro Porteño O/U 0.5 | 35% |
| Both Teams to Score | 32% |
| Club Cerro Porteño O/U 1.5 | 32% |
| SE Palmeiras O/U 2.5 | 30% |
| 1st Half O/U 1.5 | 24% |
| SE Palmeiras (-2.5) | 23% |
| O/U 3.5 | 21% |
| SE Palmeiras 1st Half O/U 1.5 | 18% |
| Club Cerro Porteño 1st Half O/U 0.5 | 15% |
| O/U 4.5 | 9% |
| Both Teams to Score in First Half | 9% |
| 1st Half O/U 2.5 | 7% |
| O/U 5.5 | 3% |
| Club Cerro Porteño (-1.5) | 1% |
| Club Cerro Porteño (-2.5) | 0% |
Market context
Palmeiras travel to Paraguay to face Cerro Porteño on 12 August in the Copa Libertadores group stage. The match kicks off at 6:00 PM ET, with settlement occurring at 10:00 PM ET the same evening. Current odds imply a near coin-flip scenario at 49% YES, suggesting meaningful uncertainty around whether additional markets will materialise for this fixture on the prediction platform.
Historical precedent shows Copa Libertadores matches—particularly those involving Brazilian clubs with large supporter bases—typically attract secondary market creation once primary outcomes settle. Palmeiras' prominence in the competition and Cerro Porteño's status as a Paraguayan heavyweight have historically driven liquidity across multiple derivative contracts. The 49% probability reflects genuine ambiguity about platform coverage depth rather than event uncertainty; comparable group-stage fixtures between established sides have generated 3–5 ancillary markets within 24 hours of the primary result.
Traders should monitor Palmeiras' squad availability and any late injury announcements before 12 August, as these directly influence whether bookmakers and platform operators deem the match sufficiently liquid for secondary markets. Cerro Porteño's recent form in domestic competition and Copa Libertadores standings will also shape perceived trading interest. The settlement window closes at 22:00 UTC, creating a hard deadline for market operators to confirm whether additional contracts will launch. USDC settlement mechanics remain standard across btc-prediction.bet, with no funding-rate dynamics or on-chain collateral constraints expected to affect this particular market's viability.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
UK Frequently Asked Questions
- Why USDC and not ETH or USDT?
- USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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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