Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
95% | 5% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
95% | 5% | 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 |
|---|---|
| Nigel Farage | 95% |
| Person B | 50% |
| Person C | 50% |
| Person D | 50% |
| Person E | 50% |
| Person F | 50% |
| Person G | 50% |
| Person H | 50% |
| Person I | 50% |
| Person J | 50% |
| Person K | 50% |
| Person L | 50% |
| Person M | 50% |
| Person N | 50% |
| Person O | 50% |
| Person P | 50% |
| Person Q | 50% |
| Person R | 50% |
| Person S | 50% |
| Person T | 50% |
| Person U | 50% |
| Person V | 50% |
| Person W | 50% |
| Person X | 50% |
| Person Y | 50% |
| Person Z | 50% |
| Person AA | 50% |
| Person AB | 50% |
| Person AC | 50% |
| Person AD | 50% |
| Person AE | 50% |
| Person AF | 50% |
| Person AG | 50% |
| Person AH | 50% |
| Person AI | 50% |
| Person AJ | 50% |
| Person AK | 50% |
| Person AL | 50% |
| Person AM | 50% |
| Person AN | 50% |
| Person AO | 50% |
| Person AP | 50% |
| Person AQ | 50% |
| Person AR | 50% |
| Other | 50% |
| Count Binface | 3% |
| Giles Watling | 0% |
| Jovan Owusu-Nepaul | 0% |
| Matthew Bensilum | 0% |
| Natasha Osben | 0% |
| Tony Mack | 0% |
| Andrew Pemberton | 0% |
Market context
Nigel Farage’s announced resignation as Clacton’s MP in July 2026 has triggered an imminent by-election, with the incumbent intending to stand again. The crowd-implied 95% YES probability reflects Reform UK’s dominance in this Essex coastal seat, where Farage secured 46.2% of the vote in the 2024 general election—the party’s strongest national performance that year[1]. Electoral Calculus predicts Reform will hold the seat, mirroring Farage’s 2024 margin over Conservatives and Labour[2]. Historical precedent from the 2014 Clacton by-election, triggered by a Conservative MP’s resignation, shows incumbents often retain such seats when local support is entrenched, though turnout dynamics can shift outcomes[5].
Traders should monitor Tendring District Council’s official by-election timetable, candidate registration deadlines, and Farage’s confirmed campaign launch, as delays could push results beyond the June 2027 settlement window[3]. The Greens have declined to stand a candidate, reducing opposition fragmentation, while Labour and Conservatives remain key challengers[7]. On-chain mechanics tie this to USDC settlement: if BTC/ETH macro volatility spikes funding rates or whale flows surge, liquidity for this contract may tighten, affecting price discovery. Monitor crypto data from CoinGecko for spot exchange trends, as BTC dominance shifts often correlate with prediction market liquidity shifts in volatile macro periods. Official results from Tendring District Council will resolve ambiguity, ensuring final settlement aligns with verified outcomes.
Methodology
This page reads Clacton by-election Winner on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- 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.
- How does UMA secure the resolution?
- The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.
- How volatile are crypto prediction markets?
- Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.
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