Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| O/U 0.5 | 100% |
| 1st Half O/U 0.5 | 100% |
| Grêmio FBPA O/U 0.5 | 100% |
| Grêmio FBPA 1st Half O/U 0.5 | 100% |
| Grêmio FBPA O/U 1.5 | 1% |
| Grêmio FBPA O/U 2.5 | 1% |
| Mirassol FC O/U 0.5 | 1% |
| Mirassol FC O/U 1.5 | 1% |
| Mirassol FC O/U 2.5 | 1% |
| Both Teams to Score in Second Half | 1% |
| 2nd Half O/U 0.5 | 1% |
| Grêmio FBPA 2nd Half O/U 0.5 | 1% |
| Grêmio FBPA 2nd Half O/U 1.5 | 1% |
| Mirassol FC 2nd Half O/U 0.5 | 1% |
| Mirassol FC 2nd Half O/U 1.5 | 1% |
| Grêmio FBPA (-1.5) | 0% |
| Mirassol FC (-1.5) | 0% |
| Grêmio FBPA (-2.5) | 0% |
| Mirassol FC (-2.5) | 0% |
| O/U 1.5 | 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% |
| Grêmio FBPA 1st Half O/U 1.5 | 0% |
| Mirassol FC 1st Half O/U 0.5 | 0% |
| Mirassol FC 1st Half O/U 1.5 | 0% |
| 2nd Half O/U 1.5 | 0% |
| 2nd Half O/U 2.5 | 0% |
Market context
Grêmio’s Copa do Brasil tie with Mirassol is the real-world event behind this market, and the live pricing at 0% YES is consistent with a leg that has not yet delivered the specific in-play condition being traded. Recent head-to-head and match results are the main frame for reading that probability: Mirassol beat Grêmio 2-1 in Serie A on 17 July 2026, and ESPN also lists Mirassol as the winner in the 2 August meeting, while earlier 2025 and 2026 results on the same matchup page show Mirassol has had the better of the recent series.[1][5][16][17][20]
For traders, the catalyst to watch is the match itself rather than external football news: the market resolves off what happens in the Copa do Brasil game scheduled for 5 August at 6:30 PM ET, and the relevant dependency is the scoreline or timing condition defined by the contract.[18][19] In practical terms, any pre-match team sheet, injury bulletin, or late tactical change matters only insofar as it shifts expectations around whether Grêmio can control the second half or whether Mirassol can strike first; the most recent ESPN fixture listing and the market contract both point to that single game as the key trigger.[18][19]
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 Grêmio FBPA vs. Mirassol FC - More Markets 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
- How accurate are political prediction markets?
- Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.
- Can prediction markets influence election outcomes?
- Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.
- 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 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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