Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
93% | 7% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
93% | 7% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 27°C | 93% |
| 28°C | 7% |
| 23°C or below | 0% |
| 24°C | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
Chengdu’s highest temperature is usually set by a humid summer profile rather than a single extreme spike, and July climatology puts daytime highs around 30–31°C, with record July highs near 40°C in broader city histories and 35.7°C on 31 July in some July tables.[4][11][15] That makes a 0% crowd-implied “YES” look like a pure outlier stance against the local seasonal baseline, but the market settles on the highest reading at Chengdu Shuangliu International Airport Station, not the citywide average, so airport-specific heat and any afternoon convection matter more than headline city averages.[6][9] On a comparable-case reading, markets tied to a single-day weather maximum tend to price in tail-risk from very hot afternoons, while still anchoring on the usual July range rather than the record book.
From a regulatory and access angle, German GlüStV treatment is the main practical friction for retail access in Germany because weather-event contracts are still prediction-market products, not ordinary sportsbook tickets, so platform availability and account geofencing can matter even where the event itself is innocuous. In the US, CFTC reach is relevant because event contracts can fall within derivatives oversight if offered to US persons, which is why venue choice and jurisdiction checks are part of the accessibility picture. “No-KYC up to $1,500” generally means a trader may be able to open and use the market with only light verification until cumulative activity or withdrawals cross that threshold, which improves access for small positions but does not remove jurisdictional blocks or identity checks once limits are hit.
For catalysts, the key watchpoint is the daily temperature path at ZUUU: if Chengdu runs hot early, the later maximum is often determined by whether cloud cover, rain bands, or a late-afternoon thunderstorm cap the peak before the airport observation window closes.[6][9] Traders should also watch official forecasts and aviation weather updates for signs of a heat advisory, shifting monsoon moisture, or a convective break, because those can change the odds on whether the day finishes in the low-30s or pushes into the mid-30s Celsius.
Methodology
This overview of Highest temperature in Chengdu on July 31? 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
- Do I need to KYC for Is Kalshi Legit?
- 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. Is Kalshi Legit 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. Is Kalshi Legit 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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