April 19, 2026 - April 20, 2026: The price of the 22°C option surged from 25.5c to 45c, and the 23°C option surged from 22c to 37.5c, while the 21°C option plummeted from 26.5c to 7c. This occurred because as the date approached, meteorological models provided more precise temperature forecasts, eliminating the likelihood of lower temperatures and locking expectations in the 22°C to 23°C range.

Indicting a sitting head of state (especially of an adversary like Cuba) is rare but not unprecedented (e.g., Maduro of Venezuela). Given the long-standing tension and potential accusations regarding terrorism support or drug trafficking, it is a moderately exotic but plausible scenario.

There is a divergence between the market's implied probability (32%) and mainstream media coverage. While media reports heavily focus on ongoing US-Cuba bilateral negotiations and de-escalation gestures like prisoner releases by Cuba, the market price has recently climbed, possibly overpricing the risk of a surprise indictment under the Trump administration's 'maximum pressure' strategy.

April 19, 2026 - April 20, 2026, the price of the 12°C option surged from 11c to roughly 27c, and the 11°C option jumped from 13c to 25c, while the 8°C option plummeted from 23.5c down to around 3c. This was caused by a major update in short-term weather forecasting models, projecting a warm front for Toronto on April 21 and significantly raising the expected high temperature.

April 19, 2026 - April 20, 2026, the price of '16°C' steadily climbed from 26c to 43.5c, while '18°C' plummeted from a high of 32c to 11.5c, and '15°C' retreated from 25c to 12.5c. This occurred because, as the resolution date approached, weather forecasting models converged, confirming that the high temperature at Shanghai Pudong Airport would likely land in the 16°C-17°C range, prompting the market to dump outlier options and consolidate around 16°C.

Weather forecasting is a niche but established category in prediction markets (e.g., widely seen on Kalshi). While the general public rarely bets on the specific daily high temperature of a single city, it is a common data-driven market for weather enthusiasts and quantitative traders, making its novelty level moderate.

April 19, 2026 - April 20, 2026: The Yes price for 12°C increased from 29c to 56.5c, as updated weather forecasts increasingly confirmed a maximum temperature of 12°C for the day. Meanwhile, the Yes price for 11°C also rose from 14.5c to 30.5c. April 19, 2026 - April 20, 2026: The Yes price for 13°C dropped from 30c to 12.5c, reflecting a decreased likelihood of higher temperatures.