Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Bot UK) Pick polygram.ink (preferred broker) |
49% | 51% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
49% | 51% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 29°C | 49% |
| 30°C | 27% |
| 28°C | 24% |
| 31°C | 4% |
| 32°C | 1% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 33°C | 0% |
| 34°C or higher | 0% |
Market context
Hong Kong's summer heat peaks in July, with the Observatory's daily maximum temperature readings forming the basis for settlement. The market resolves to whichever temperature band captures the highest reading recorded on 14 July 2026, sourced directly from the Hong Kong Observatory's published daily extract data once finalised. Resolution depends entirely on official publication; early or preliminary readings do not trigger settlement.
Historical July maxima in Hong Kong cluster between 32–35°C, though readings above 36°C occur roughly once per decade during particularly intense heat events. The 0% crowd probability suggests either extreme confidence in a specific temperature band or insufficient liquidity across the full range. Traders building conditional orders or bot-driven strategies should reference the Observatory's twenty-year daily maximum dataset to calibrate expected distributions; July 2023 peaked at 34.8°C, whilst July 2015 reached 35.9°C. These precedents establish the typical envelope against which outlier scenarios—tropical cyclone precursors or anomalous high-pressure systems—can be programmatically weighted.
Monitoring the Hong Kong Observatory's seasonal forecasts and the Japan Meteorological Agency's western Pacific pressure patterns through early July 2026 provides actionable signals. Tropical cyclone activity in the South China Sea typically influences late-July temperatures; early-month readings tend toward stability unless an unusual heat dome develops. Traders implementing automated feeds should note that the Observatory publishes daily extracts with a lag; the settlement window closes at noon UTC on 14 July, but official temperature data may not be available until the following day, creating a known delay in final resolution.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Bot UK, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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