Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
54% | 46% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
54% | 46% | 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 |
|---|---|
| 29°C | 54% |
| 28°C | 24% |
| 30°C | 10% |
| 31°C | 1% |
| 23°C or below | 0% |
| 24°C | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 32°C | 0% |
| 33°C or higher | 0% |
Market context
Shenzhen’s hottest reading on 2 August will be set by the airport station, so the market is really about whether the day peaks near the city’s usual early-August heat or breaks into a higher extreme. Current pricing at 0% YES suggests traders see little reason to expect an outcome outside the lower temperature bands, despite the fact that Shenzhen’s August norms are already warm, with average highs around 32–36°C depending on the source and station.[1][2][4][9]
Historical comparables point to a fairly tight central range but with meaningful upside tails. Weather summaries for Shenzhen put typical August highs near 89–91°F, or about 32–33°C, while some day-by-day historical tables show individual 2 August highs in the mid-30s Celsius and broader August record highs reaching 103°F in the city.[2][4][5][7] That combination means the market is not being asked to price an ordinary average; it is leaning on whether the airport station sees a daytime spike above the seasonal norm, which is the main reason a zero-implied-probability profile can persist only if traders expect the lower bands to dominate.[1][5][9]
The catalyst to watch is the live weather trajectory into the afternoon local time in Shenzhen, with the key dependency being whether cloud cover, rain bands, or a late-morning heating surge determines the day’s maximum before the settlement window closes. Nearby station history from Shenzhen Bao’an also shows that the airport can already be warm early in the day, so traders should focus on updated observations rather than broad monthly averages alone.[10][15] In market terms, this is a weather-forecast trade: the relevant move will come from the day’s forecast evolution and any abrupt shift in the local rain/typhoon pattern, not from scheduled announcements or campaign-style events.[19]
Methodology
This page tracks Highest temperature in Shenzhen on August 2? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.
Resolution & payout
Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.
Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.
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.
- 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.
- 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.
- 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.
- 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.
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