Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legit) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
99% | 1% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 32°C | 99% |
| 33°C | 1% |
| 24°C or below | 0% |
| 25°C | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 34°C or higher | 0% |
Market context
Busan’s temperature on 10 August will be set by the highest reading logged at Gimhae Intl Airport Station in Weather Underground’s **Daily Observations** table, so the relevant number is the station maximum rather than any headline “Day High & Low” figure. In practical terms, the market is really asking whether the day tops out in the **high 20s, low 30s, or above**, with the current crowd price of 0% for YES implying traders see no live path to the named outcome range. Forecast context points to a warm, humid midsummer profile: AccuWeather and Timeanddate both put Busan’s August highs around the mid- to upper-20s Celsius, while recent Busan-specific forecast pages show around 28–31°C for 10 August and some thunderstorm risk.[1][8][12][15]
The historical frame is straightforward: August is Busan’s hottest month on average, but daily peaks can vary sharply with cloud, sea breeze, and convective rain. Climate references put typical August highs near 29–30°C, with the warmest days often reaching the mid-30s, and Busan’s all-time August 10 high cited in climate tables is 34.6°C, which is materially above the current forecast band.[7][11][18] That history means probabilities should be read as a distribution over a fairly tight summer range rather than as a binary hot/cool call, especially when thunderstorms can cap daytime maximums even in a heatwave.[16][18]
For accessibility and compliance, the market sits inside a broader regulatory frame that can matter to traders even when the forecast itself is simple. A German-accessed venue can trigger scrutiny under the **GlüStV** because prediction markets may be treated as gambling-like products, while the **US CFTC** has broad reach over event contracts offered to US persons, especially where they resemble derivatives on contingent outcomes. “No-KYC up to $1,500” generally means a user can transact without identity verification until cumulative activity hits that threshold, but it does not remove geo-restrictions, sanctions screening, or the possibility that access rules change by jurisdiction or platform policy.[3]
Methodology
This overview of Highest temperature in Busan on August 10? reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
FAQ
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legit has a different geo footprint.
- Do I need to KYC for Is Kalshi Legit?
- Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
- How are winnings taxed?
- Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
- What happens during a tax audit?
- You're responsible for documenting your trades. Is Kalshi Legit exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legit would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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