Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
95% | 5% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
95% | 5% | 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 |
|---|---|
| 34°C | 95% |
| 35°C | 4% |
| 36°C | 2% |
| 37°C | 1% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 38°C or higher | 0% |
Market context
A severe heat warning is in force for parts of the Seoul metropolitan area, and forecasts for 4 August point to highs around 37-38°C in the capital region, with Incheon also near 37°C. SBS reports Seoul could reach 38°C, while Asiae’s forecast puts Incheon at 37°C and says any afternoon showers are unlikely to cool conditions materially.[1][3][4]
That backdrop makes the market’s 0% YES price look hard to square with the weather setup: August is normally one of Seoul’s hottest periods, and the city’s early-August climatology is already near peak summer heat. WeatherSpark notes 4 August is typically the hottest day of the year in Seoul, with typical highs in the mid-30s Celsius, while Holiday Weather lists an August record high of 38.2°C, showing that very hot outcomes are not unusual enough to dismiss outright.[13][16]
For traders, the key catalysts are the afternoon temperature peak and whether cloud, rain or sea-breeze effects shave a degree or two off the airport reading. KMA-linked alerts started at 11:00 local time, and both SBS and Asiae indicate the heatwave should persist through the day even with scattered showers later on.[1][3][4] The decisive variable is the highest reading logged at Incheon Intl Airport Station before the settlement window closes, not the feel-like temperature or the broader Seoul city forecast.
Methodology
Sports-specific comparison page for Highest temperature in Seoul (Incheon) on August 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
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