Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
99% | 1% | 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 |
|---|---|
| 36°C | 99% |
| 37°C | 1% |
| 30°C or below | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 38°C | 0% |
| 39°C | 0% |
| 40°C or higher | 0% |
Market context
Beijing’s airport temperature on 6 August typically sits in the low-to-mid 30s Celsius, and the current market at 0% YES is effectively treating an unusually hot reading as very unlikely. Long-run August guides put Beijing’s daytime highs around 30–33°C, with some days closer to 34–36°C, which leaves room for a 35°C-plus outcome but not enough to make it common.[2][10][11][19]
Historical framing points to a market that should move mainly on whether the city gets a brief surge of heat rather than on the month’s average profile. AccuWeather’s August outlook for Beijing shows daily highs mostly in the mid-80s to about 90°F, while other August guides describe the month as hot, humid and prone to rain, which can cap extremes even when the broader seasonal backdrop is warm.[1][11][17] That makes the current zero-priced stance consistent with a trader base that is expecting a normal summer day rather than a heat spike.
The main catalyst to watch is the day’s actual airport observation stream, not politics-style events, because the market resolves on the highest temperature at Beijing Capital International Airport rather than a citywide forecast. The nearest useful dependency is whether the air mass remains dry and stable through the afternoon; official city forecasts for Beijing have recently shown highs around 36°C, but airport readings can land lower if cloud or rain develops.[4][15][18] In practical terms, any late-morning forecast revision, thunderstorm risk, or cooling rain could keep the ceiling below the hotter forecast range, while clear-sky continuation would be the bullish cue for a higher settlement.[3][4][18]
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 Beijing on August 6? 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.
UK Frequently Asked Questions
- 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.
- 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.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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