Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
64% | 36% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
64% | 36% | 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 |
|---|---|
| 35°C | 64% |
| 36°C | 33% |
| 37°C | 1% |
| 29°C or below | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 38°C | 0% |
| 39°C or higher | 0% |
Market context
Shanghai experiences pronounced seasonal temperature variation, with July typically amongst the hottest months of the year. Historical data from Shanghai Pudong International Airport shows July daily highs consistently range between 32–35°C, though extreme heat events have occasionally pushed readings above 37°C. The 0% crowd probability suggests traders are either uncertain about the specific temperature threshold being tested or expect relatively moderate conditions for the settlement date.
Comparable July temperature records at Shanghai Pudong provide the primary reference frame. Over the past decade, July 25th specifically has recorded highs between 31–34°C in most years, with only occasional excursions into the 35–37°C band. The current probability distribution reflects baseline expectations aligned with typical mid-to-late July conditions rather than anomalous heat. Traders should monitor long-range weather forecasts released in early July 2026, particularly those tracking potential heat domes or monsoon patterns affecting eastern China during that period.
The settlement mechanism depends entirely on Wunderground's historical records for Shanghai Pudong International Airport Station, making data availability the critical dependency. Traders should verify the platform's reporting consistency ahead of the settlement window closing on 25 July 2026 at 12:00 UTC. Any significant atmospheric patterns—such as Tibetan high-pressure systems intensifying over central China—would warrant reassessment of temperature range probabilities in the weeks preceding the resolution date.
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 Shanghai on July 25? 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
- How accurate are political prediction markets?
- Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.
- 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.
- Can prediction markets influence election outcomes?
- Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.
- 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.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
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