April 21, 2026 (04:28-10:58) - The price of the 11°C option plummeted from 31c to 16.5c, while the 13°C option surged from 16c to 32c. This was due to updated meteorological data indicating that the high temperature might be slightly warmer than previously expected, shifting the market focus from 11-12°C to 12-13°C. April 20, 2026 (05:43-06:48) - The price of the 9°C option plummeted from 19.5c to 7.5c, and the 8°C option dropped from 16c to 5.95c. This is due to weather forecasts stabilizing and pointing towards warmer temperatures (11-12°C) as the date approaches, leading the market to quickly discount the likelihood of colder weather.

April 20, 2026 - April 21, 2026: The price of the 30°C option surged from 20.5c to 41.5c, while the 27°C option plummeted from 21c to 1.4c. This was caused by updated and more definitive short-term weather forecasts indicating significantly higher temperatures than previously expected. April 20, 2026: Option prices experienced some adjustments. The 31°C option dropped from 18.5c to 8.5c, and the 27°C option dropped from 21c to 12c. This was mainly due to updated weather forecasts at the time, causing the market to temporarily reallocate funds toward 28°C and 29°C.

The total market probability (sum of all Yes prices) is near 178%, which is mathematically completely irrational, indicating severe mispricing. Mainstream forecasts typically place Taylor Swift and Morgan Wallen as the top contenders, whereas the prediction market currently assigns unreasonably high win probabilities to Tyler, The Creator and Billie Eilish, which conflicts with Billboard's usual streaming and sales-dominated logic.

Resolution heavily relies on a specific third-party tracker (xtracker), introducing risks of data discrepancies due to downtime or missed deleted tweets. Additionally, the specific exclusion of general replies but inclusion of 'main feed replies' can easily lead to classification disputes.

Predicting the exact number of posts an individual makes over a specific two-day window is highly niche and arbitrary. The general public does not naturally ponder this, making it a highly gamified and novelty-driven market.

April 20, 2026 - April 21, 2026, the price of the '40-64' option surged from 29.5c to 42.5c. This was driven by the market adjusting expectations downwards based on Musk's recent actual posting frequency, favoring a slightly lower output bracket. Historical context: No other significant price movements exceeding 10 cents have been detected recently. Market expectations remain relatively stable overall.