Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Polymarket Legal in Canada) Pick polygram.ink (preferred broker) |
94% | 6% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
94% | 6% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 32°C | 94% |
| 33°C | 6% |
| 25°C or below | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
The event is the highest daytime temperature recorded at Incheon International Airport on 1 August, with settlement based on the Wunderground daily history page for that station. At 05:00 UTC, the market’s 0% YES price looks conservative against a live heatwave backdrop: South Korea has just logged a national temperature record of 41.4°C in Yangsan, while Seoul and Incheon were still sitting on tropical-night lows around 27.4°C and 26.8°C respectively, and the day’s forecast range was 32–39°C nationwide.[6][1]
For framing, this sort of weather contract typically tracks the upper tail of the local forecast rather than the city average. Incheon’s August climatology is much milder, with monthly maximums around 29°C, but the current synoptic pattern is unusually hot across the peninsula, which raises the chance of an above-normal airport reading even if sea influence trims the peak versus inland Seoul.[5][12][18] Comparable summer heat events in Korea have produced sharp, same-day jumps in market-relevant temperatures, so a near-zero price mainly reflects uncertainty about whether Incheon reaches the highest settlement band rather than a view that heat is absent.[6][9]
For accessibility, German GlüStV treatment depends on how the venue classifies the product, but a weather prediction market can still raise gambling-law questions if it is viewed as a wager on an external event; US CFTC reach is relevant if the product or operator falls within US derivatives jurisdiction, even where the underlying event is non-financial. “No-KYC up to $1,500” usually means a participant can trade and withdraw only within that limit without identity verification, which affects onboarding friction but does not remove any regulatory constraints tied to jurisdiction, residency screening, or the market’s own access rules.
Methodology
This overview of Highest temperature in Seoul (Incheon) on August 1? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Polymarket Legal in Canada has a different geo footprint.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Polymarket Legal in Canada exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- Are prediction markets gambling?
- Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
- Is there a withdrawal cap?
- No platform-side cap. You can withdraw any amount provided KYC is complete. SEPA bank withdrawals over €15,000 trigger additional anti-money-laundering checks (statutory obligation for all platforms).
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