Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| Goiás EC (-1.5) | 100% |
| O/U 0.5 | 100% |
| O/U 1.5 | 100% |
| 1st Half O/U 0.5 | 100% |
| Goiás EC O/U 0.5 | 100% |
| Goiás EC 1st Half O/U 0.5 | 100% |
| 2nd Half O/U 0.5 | 100% |
| Goiás EC 2nd Half O/U 0.5 | 100% |
| Goiás EC O/U 1.5 | 99% |
| Goiás EC O/U 2.5 | 1% |
| Ceará SC O/U 0.5 | 1% |
| Ceará SC O/U 1.5 | 1% |
| Ceará SC O/U 2.5 | 1% |
| Ceará SC (-1.5) | 0% |
| Goiás EC (-2.5) | 0% |
| Ceará SC (-2.5) | 0% |
| O/U 2.5 | 0% |
| O/U 3.5 | 0% |
| O/U 4.5 | 0% |
| O/U 5.5 | 0% |
| Both Teams to Score | 0% |
| Both Teams to Score in First Half | 0% |
| 1st Half O/U 1.5 | 0% |
| 1st Half O/U 2.5 | 0% |
| Goiás EC 1st Half O/U 1.5 | 0% |
| Ceará SC 1st Half O/U 0.5 | 0% |
| Ceará SC 1st Half O/U 1.5 | 0% |
| Both Teams to Score in Second Half | 0% |
| 2nd Half O/U 1.5 | 0% |
| 2nd Half O/U 2.5 | 0% |
| Goiás EC 2nd Half O/U 1.5 | 0% |
| Ceará SC 2nd Half O/U 0.5 | 0% |
| Ceará SC 2nd Half O/U 1.5 | 0% |
Market context
The Brazil Serie B match between Goiás EC and Ceará SC, scheduled for 4 July 2026 at 23:00 UTC in Goiânia, has already concluded with a definitive result that locks the prediction market at 100% YES. Historical head-to-head data shows Goiás has won five of the previous twelve meetings, while Ceará won only twice, with five draws ending the contest[1]. This pattern of Goiás’s superior goal-scoring efficiency—+21% better than Ceará—frames the current certainty, as the match outcome aligns precisely with their long-term dominance in this fixture[1].
Traders should monitor on-chain settlement mechanics for USDC payouts, which will be processed once the blockchain confirms the final match result. While macro factors like BTC and ETH funding rates may influence liquidity, the immediate catalyst is the official match sheet release from the Campeonato Brasileiro Série B, confirming the final score and goal tally[3]. Recent exchange spot data indicates minimal whale flow volatility ahead of settlement, suggesting stable conditions for USDC redemption[4]. The market’s closure reflects the match’s completion, with no further announcements or schedule dependencies expected to alter the outcome.
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.
FAQ
- 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.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- Which crypto markets exist on Polymarket?
- Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.
- Are crypto prediction markets taxable in the US?
- In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.
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