Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) 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 |
|---|---|
| August 1 | 100% |
| August 3 | 100% |
| August 4 | 100% |
| August 5 | 100% |
| August 6 | 100% |
| August 7 | 100% |
| August 8 | 100% |
| August 9 | 100% |
| August 10 | 100% |
| August 12 | 100% |
| August 13 | 100% |
| August 29 | 94% |
| August 31 | 94% |
| August 17 | 93% |
| August 22 | 93% |
| August 27 | 93% |
| August 14 | 92% |
| August 20 | 92% |
| August 24 | 92% |
| August 25 | 92% |
| August 28 | 92% |
| August 15 | 91% |
| August 19 | 91% |
| August 21 | 91% |
| August 26 | 91% |
| August 16 | 90% |
| August 18 | 90% |
| August 30 | 90% |
| August 23 | 88% |
| August 2 | 0% |
| August 11 | 0% |
Market context
The market assesses whether Donald Trump will publicly insult an individual on a single specified date between now and end-August 2026. The crowd has priced this at certainty—100% implied probability—suggesting near-universal expectation that such an insult will occur on the given day. This reflects Trump's documented pattern of public criticism directed at political opponents, media figures, and others throughout his political career and presidency. The resolution criteria require direct, on-the-record language made publicly available: social media posts, rally remarks, press conference statements, or recorded interviews qualify, whilst private comments later leaked do not.
Historical precedent strongly supports the crowd's positioning. Trump has made insulting public statements on the vast majority of days he has been in the public eye since 2015, targeting journalists, politicians, business rivals, and celebrities with consistent frequency. During his presidency and since, such remarks appeared across multiple platforms and settings—from formal speeches to informal remarks to reporters. The specificity of resolving on a single date rather than across a period makes the outcome dependent entirely on Trump's activity and public engagement on that particular day.
Traders should monitor Trump's scheduled appearances, rally dates, and media availability in the weeks preceding the settlement window. Extended periods without public statements—illness, legal proceedings, or voluntary withdrawal from public comment—would represent the primary catalyst for a "No" resolution. Recent reporting indicates Trump maintains an active public schedule through 2026, though unexpected circumstances could alter this trajectory. The 100% pricing leaves no margin for scenarios where Trump remains entirely silent or unavailable on the specified date.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
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
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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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