Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Is Kalshi Legal in California) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Go to the live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Go to the live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Go to the live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Go to the live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Go to the live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 39°C | 100% |
| 36°C or below | 0% |
| 37°C | 0% |
| 38°C | 0% |
| 40°C | 0% |
| 41°C | 0% |
| 42°C | 0% |
| 43°C | 0% |
| 44°C | 0% |
| 45°C | 0% |
| 46°C or higher | 0% |
Market context
Busan’s observed high at Gimhae International Airport on 1 August is the settlement driver here, and the market is effectively pricing the chance that the day’s maximum lands in the upper end of the late-summer range. August is climatologically Busan’s warmest month, with typical highs around 31–32°C and frequent humidity, while recent commentary around South Korea has pointed to an ongoing heatwave pattern under the North Pacific High that can lift coastal maxima well above seasonal averages.[5][6][14][1]
The current 0% implied probability for YES is a market price, not a statement that the event cannot occur; comparable summer weather markets often move sharply on the day if an official airport reading pushes into a higher temperature band late in the afternoon local time. Busan has already seen extreme heat in recent summers, including 38.8°C reported this week as the city’s highest reading since records began, which is the sort of precedent traders use when judging whether a high range remains reachable.[17][18][1]
For accessibility, the regulatory frame matters as much as the weather. A German-facing venue that falls under the GlüStV regime can face tighter product, advertising, and customer-friction controls than a lightly verified offshore market, whereas US CFTC reach is mainly relevant where a contract may be treated as a derivatives-style event wager. In practical terms, “no-KYC up to $1,500” means a user may be able to take a limited position before identity checks are triggered, but it does not remove geoblocking, platform-level compliance screening, or the fact that this market resolves only from the Wunderground Gimhae Intl Airport Station reading published after the settlement window closes.[1]
Methodology
This overview of Highest temperature in Busan on August 1? 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 Legal in California has a different geo footprint.
- Do I need to KYC for Is Kalshi Legal in California?
- 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.
- Can I trade anonymously?
- Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
- What if regulation changes?
- If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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