Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Legal UK) Pick polygram.ink (preferred broker) |
46% | 54% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
46% | 54% | 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 | 46% |
| 31°C | 43% |
| 32°C | 9% |
| 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 event is the **highest temperature recorded at Shenzhen Bao’an International Airport on 27 July 2026**, with settlement tied to the Wunderground daily history page for that station. In practical terms, the market is a bet on the day’s peak heat rather than the average, so early-morning cloud, rain bands, or a delayed clearing can matter more than the day’s headline forecast. At 05:00 UTC, AccuWeather showed Shenzhen at 82°F with a RealFeel of 92°F and a 34% precipitation chance, while July climatology for the city is typically around 32°C by day and 26°C by night, with frequent rain[1][3].
The current **0% YES** implied probability is consistent with a market that is effectively asking whether the airport station will post an unusually low maximum versus its normal July pattern. Comparable July norms in Shenzhen centre on highs near 32°C, and wetter conditions are common across the month, which can cap daytime peaks if cloud cover and rain persist[2][3]. For context, the resolution source is a station-specific historical record, so the contract is about what actually prints at Shenzhen Bao’an International Airport, not a citywide forecast or a broader metropolitan average.
On the regulatory and access side, this is a weather market, but the compliance framing still matters: in Germany, GlüStV rules are relevant because they can restrict or treat event-style gambling products differently depending on structure and availability. In the US, CFTC reach is the key jurisdictional issue for event contracts that may fall within derivatives oversight, although enforcement depends on product design and market access. “No-KYC up to $1,500” generally means a user can usually take part without full identity verification until cumulative activity crosses that threshold, which can make a small weather position accessible more quickly, but does not remove jurisdictional or platform restrictions.
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
- 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. Polymarket Legal UK 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).
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Polymarket Legal UK would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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