Seoul May 1 High Temp: Market Locks In Nineteen Degrees

The Seoul temperature market for May 1 is not a question anymore. The contract tracking whether the daily high reaches exactly 19°C has moved to full certainty, with the 24-hour price swing telling the real story: traders repriced this outcome by nearly 56% in a single day after actual weather data came in. That is not speculation. That is a market reacting to a measurement.

As of 2026-05-01 04:10:19, the 19°C outcome sits at 1.00, implying a 100% probability. The resolution window closes at 2026-05-01 12:00:00. Whatever Seoul’s meteorological stations recorded as the May 1 daily maximum, the market has concluded that 19°C is the answer.

How the Seoul Temperature Contract Works

This contract resolves YES if the highest recorded temperature in Seoul on May 1, 2026 equals exactly 19°C. The market offers a full bracket of outcomes: 10°C or below, 11°C through 20°C or higher, each as a separate contract. Resolution depends on official meteorological data for Seoul, with the outcome determined at the 2026-05-01 12:00:00 deadline.

• YES (19°C): 1.00 price, 100% implied probability. The market treats this outcome as resolved.
• NO (any other temperature): 0.00 price, 0% implied probability. Every competing bracket has been priced to zero.

For the NO side to pay out, the official Seoul daily maximum for May 1 would need to come in at any value other than 19°C. That means 18°C, 20°C, or any other reading from the full bracket would invalidate the YES contract. At 0.00, the market is assigning zero probability to that happening. The competing outcome brackets, from 20°C or higher down to 10°C or below, have all collapsed to zero as traders converged on 19°C.

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Momentum and Market Signals

The momentum composite here is unusually clean. A 24-hour price change of +55.9%, a trend score of 65.13, and a 1-hour change of +0.0% together describe a market that repriced sharply on a specific data signal, then stopped moving because there is nothing left to reprice. The +0.0% hourly change confirms the market has settled. The driver was almost certainly the publication or confirmation of Seoul’s May 1 temperature reading, which pushed the 19°C contract from around 0.31 at open to 1.00 by morning.

Total volume stands at $322,694, with $288,937 of that trading in the last 24 hours. That means roughly 89% of all activity in this market happened in a single day, concentrated around the repricing event. Liquidity is $19,633, which is thin. At this price level, that thinness is irrelevant for price stability since the contract is fully priced. But it does mean that if any data dispute emerged before the noon resolution, the order book could not absorb a large counter-trade without moving price.

Key Factors:

• The 1-hour price change of +0.0% confirms the market has stopped moving. No new information is expected before the 2026-05-01 12:00:00 resolution.
• The 24-hour price change of +55.9% marks the moment Seoul’s May 1 temperature data became available to traders. The market repriced from 0.31 to 1.00 in that window.
• Liquidity of $19,633 is thin. A data dispute or resolution challenge would move price sharply on minimal volume.
• Open interest of $0 signals that no capital remains in pending positions. Settled markets show this pattern when all bets have been matched and nothing is outstanding.
• Trader sentiment is 100% YES and 0% NO, consistent with a market that has reached consensus on a factual outcome.

Lines Analysis: Seoul’s Temperature Data

South Korea’s Korea Meteorological Administration operates the Seoul observation network and publishes daily temperature records. The data that moved this market came from that infrastructure. When a temperature contract reprices from 0.31 to 1.00 in 24 hours, it is because traders with access to current meteorological data saw the confirmed reading and traded into certainty. The 19°C bracket absorbed all the capital.

The case for any alternative outcome requires either a measurement error in the official Seoul record or a resolution dispute about which data source governs the contract. Neither scenario carries meaningful probability at this stage. The Korea Meteorological Administration’s records for Seoul are real-time and publicly accessible. The market has already read them.

Signals to Monitor:

• Official Korea Meteorological Administration confirmation of the May 1 Seoul maximum temperature would finalize resolution with no ambiguity.
• Any resolution source dispute before 2026-05-01 12:00:00 would be the only remaining mechanism to reprice this contract away from 1.00.
• The $19,633 liquidity pool means a large institutional trade against the 19°C outcome could theoretically move price, but would require a specific counter-catalyst to hold.
• Competing brackets, including 18°C and 20°C or higher, sitting at 0.00 confirms no residual uncertainty in the market about adjacent outcomes.

The $322,694 total volume, with $288,937 arriving in 24 hours, tells you this market functioned exactly as designed. Here’s what the measurements are telling us: Seoul hit 19°C on May 1, the data reached traders, and the market converged. The data doesn’t care about the politics, and in this case, there are no politics. Just a thermometer reading in a South Korean city that traders have already priced as fact.

LINES VERDICT

Nineteen Degrees Confirmed

The Seoul May 1 temperature market has done its job. A 56-point repricing in 24 hours, driven by real meteorological data, landed this contract at full certainty before the noon resolution window.

What the market says: 100% probability that Seoul’s May 1 daily high equals exactly 19°C. With the contract at 1.00 and liquidity at $19,633, price is stable but thin. The 2026-05-01 12:00:00 resolution is a formality.

Key unknown: The only variable remaining is whether the official resolution source confirms the Korea Meteorological Administration’s 19°C reading without dispute. A data source conflict before noon is the sole mechanism that could move this market.

Frequently Asked Questions

• What does 100% probability mean here? Traders have priced the 19°C outcome at 1.00, meaning the market assigns zero probability to any other result. This reflects consensus on observed data, not a forecast.
• What would make the NO contract pay out? Any official Seoul daily maximum other than 19°C, whether 18°C, 20°C, or any bracketed alternative, would invalidate the YES contract and pay out the corresponding competing bracket.
• What data event moved this market? The 24-hour price change of +55.9% corresponds to Seoul’s May 1 temperature data becoming available. Traders repriced the 19°C bracket from 0.31 to 1.00 after confirming the reading.
• When does this contract resolve? Resolution is set for 2026-05-01 12:00:00. The market has effectively pre-resolved based on available meteorological data.
• Is the $322,694 volume reliable? Total volume is moderate. With $288,937 of that arriving in 24 hours and liquidity at only $19,633, the market is thin but has settled. Price reflects data consensus, not deep order book support.

This analysis reflects market conditions as of 2026-05-01 04:10:19. Prediction market probabilities are volatile and shift as new data and regulatory decisions emerge, especially as the 2026-05-01 12:00:00 resolution date approaches. Lines.com does not accept bets or provide financial or gambling advice. All market outcomes are uncertain.