Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
75% | 25% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
75% | 25% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 24°C | 75% |
| 25°C | 18% |
| 26°C | 7% |
| 27°C | 5% |
| 28°C | 2% |
| 29°C | 1% |
| 23°C or below | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
Chongqing’s August heat is typically intense, and the market is resolving against the highest reading at Chongqing Jiangbei International Airport Station, not the citywide average. Long-run climate guides put August among the hottest months, with typical highs around 34°C and lows in the mid-20s, while one August 3 historical benchmark listed by TravelChinaGuide shows a 34.7°C high for that date, which is close to the kinds of values that normally frame late-summer trading. [1][9]
The current 0% YES pricing is therefore leaning on the expectation that the day’s peak will stay below the market’s threshold, rather than on an unusual cool spell. The best comparable case is Chongqing’s broader extreme-heat record, which reached 43°C in August 2022, showing that very high outcomes are possible but usually tied to exceptional heat events rather than the seasonal norm. [2][1]
Traders should watch the day’s local forecast and any short-lived heat spike or thunderstorm timing, because afternoon maximums in Chongqing often depend on whether cloud cover or rain arrives before the daily peak. Recent weather pages still describe August as humid, rainy and very hot, with average highs near 33–34°C, so the catalyst for any move away from 0% is likely to be an updated forecast pointing to a clear, hotter-than-normal afternoon rather than a structural change in the seasonal setup. [1][19][9]
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Chongqing on August 3? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
FAQ
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Why do Polymarket and Kalshi differ on elections?
- Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.
- Which political events have the biggest volume?
- US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.
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