Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Germany Legal) Pick polygram.ink (preferred broker) |
57% | 43% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
57% | 43% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 35°C | 57% |
| 34°C | 38% |
| 36°C | 3% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Hong Kong's meteorological authority will record the single highest temperature reached on 12 August 2026, measured to one decimal place in Celsius. The Hong Kong Observatory publishes this daily maximum figure in its "Daily Extract" climate records, which serves as the binding resolution source. Settlement occurs at 12:00 UTC on that date, though the Observatory typically releases finalised data within days of observation.
August represents Hong Kong's peak summer season, with historical daily maxima typically ranging between 32 and 34 degrees Celsius. The Observatory's records from recent Augusts show occasional excursions above 35 degrees during heat waves, though such extremes remain statistically uncommon. The 0% crowd probability suggests traders are either awaiting specific temperature range options or reflecting uncertainty about which bracket will ultimately contain the day's peak. Comparable August dates in prior years provide the most reliable baseline for assessing likelihood across different temperature bands.
From a regulatory standpoint, this weather derivative falls under different frameworks depending on trader location. German traders should note that prediction markets on non-financial events may face scrutiny under GlüStV gaming regulations, though weather-specific contracts occupy a grey area. US participants face CFTC jurisdiction over certain prediction contracts, though weather derivatives have historically received lighter oversight than financial instruments. Platforms offering no-KYC access up to $1,500 typically apply this threshold per calendar year or per transaction, meaning larger positions or cumulative exposure may trigger identity verification requirements regardless of market category. Traders should verify their platform's specific KYC thresholds before committing capital.
Methodology
This overview of Highest temperature in Hong Kong on August 12? 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. Polymarket Germany Legal 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Polymarket Germany Legal stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- What happens during a tax audit?
- You're responsible for documenting your trades. Polymarket Germany Legal 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.
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