May 1, 2026 - May 3, 2026, the price of the 20°C option surged from 10c to 42.5c, and 19°C surged from 21.5c to a peak of 47.5c. Conversely, the 18°C and 17°C options plummeted from 36.5c and 25.5c to 6c and 0.9c, respectively. This was due to updated weather forecasts closer to the resolution date, which significantly raised the expected temperature for the day (from 17-18°C to 19-20°C).

Weather prediction is a standard but niche category in prediction markets. While specialized traders focus on this, the general public rarely speculates on the exact high temperature of a specific city on a specific day.

The prediction market currently concentrates its highest probabilities on 19°C, 20°C, and 21°C (totaling over 60%), but the resolution source (Wunderground) currently forecasts a high of only 64°F (~18°C) for May 3. Market prices may be influenced by other forecasting models (e.g., AccuWeather predicting 23°C) or historical climate averages, creating a noticeable divergence from the short-term forecast of the official resolution source.

The market asks for the 'second-highest' rather than the highest revenue, which could trap inattentive traders. Additionally, resolution relies entirely on short-term estimated data from a specific third-party platform (Anera) rather than official earnings, introducing risk of unexpected outcomes due to changes in estimation methodology or data delays.

While predicting the revenue performance of top AI companies is relatively common, targeting the 'second place' for estimated inference revenue within a specific single week is highly niche and obscure, giving it a moderate level of novelty.

May 2, 2026 - May 3, 2026: OpenAI's price surged from 29c to 82.8c, while Anthropic's price plummeted from 65.1c to 9.8c. This was due to a major reversal in market expectations for the rankings, with OpenAI again viewed as the most likely second-place finisher (possibly due to data suggesting it couldn't surpass the leader). May 1, 2026 - May 2, 2026: OpenAI's price plummeted from 97.2c to 29c, while Anthropic's price surged from 1.1c to 65.1c, reflecting extreme volatility in expectations for inference revenue rankings during the period. April 30, 2026 - May 1, 2026: OpenAI's price surged from 48c to 97.2c, while all other options (e.g., Google, Anthropic) crashed, as early data indicated OpenAI was securely in second place.

Betting on the exact daily high temperature of a specific city is a somewhat niche and novelty market. While weather forecasts are common, betting on them to the exact degree is rare for the general public and mostly appeals to weather enthusiasts or quantitative modelers.