Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
72% | 28% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
72% | 28% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 30°C | 72% |
| 31°C | 23% |
| 32°C | 7% |
| 33°C | 1% |
| 27°C or below | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C or higher | 0% |
Market context
The underlying event is the **highest temperature recorded at Shenzhen Bao’an International Airport** on 27 July, measured in Celsius for the settlement source. In practical terms, this is a single-day airport weather print, so the market should track the day’s realised maximum rather than headline city forecasts; current conditions in Shenzhen show warm, humid weather with precipitation risk, and July norms are typically around **32°C** for daytime highs[1][2][3].
A **0% YES** crowd price looks consistent with the way weather markets often trade before the relevant observation window is fully known, because the settlement depends on the airport station’s final daily maximum, not an average or citywide reading. Shenzhen’s July climate is usually hot and wet, with around **30 rainy days** and average highs near **32°C**, which means the market can still resolve into a relatively ordinary summer outcome if the day reaches the low-30s Celsius; that framing is more useful than treating the quote as a forecast of an extreme.[2][3]
For accessibility, the regulatory picture is not uniform. Under Germany’s **GlüStV**, availability can be affected by local gambling-law treatment of event contracts, while the **US CFTC** can reach markets that are treated as commodity derivatives or swaps when offered to US persons, so access depends on where a user is located and how the venue is structured. A **no-KYC up to $1,500** policy generally means small withdrawals or lifetime activity may be possible without identity checks, which lowers friction for casual participation in this specific market, but it does not remove jurisdictional blocks or change the settlement mechanics tied to Wunderground’s Shenzhen Bao’an station data.
Methodology
This overview of Highest temperature in Shenzhen on July 27? 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 Tax UK has a different geo footprint.
- Do I need to KYC for Polymarket Tax UK?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- 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 Tax UK 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 if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Tax UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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