There is a moderate interpretation risk. Key points: 1. **Post-analysis upgrades**: NOAA often re-analyzes data months after the season, upgrading a 'depression' to a 'named storm'. The market's strict settlement timeline (May 31/June 1) excludes these retrospective changes. If NOAA upgrades a May system in July, the market may have already settled incorrectly. 2. **Subtropical Storms**: While NOAA names subtropical storms (resolving 'Yes'), 'Subtropical Depressions' remain unnamed (resolving 'No'). Close attention to official NHC 'Public Advisories' vs. 'Tropical Weather Outlooks' is required for borderline systems.

Apr 28, 2026 - May 1, 2026, the price of Option_'Yes' plummeted from 52.0c to 19.5c, as the phantom weather model signals that caused the previous spike completely dissipated, prompting a rapid reversion to the climatological baseline. Apr 27, 2026 - Apr 28, 2026, the price of Option_'Yes' surged from 18.0c to 52.0c, likely due to fleeting subtropical cyclogenesis signals in long-range weather models triggering speculative buying. Apr 10, 2026 - Apr 16, 2026, the price of Option_'Yes' gradually decayed from 45.5c to 36.5c, as the noise from previous long-range weather models dissipated and the market slowly reverted toward the climatological baseline due to time decay. Apr 7, 2026 - Apr 9, 2026, the price of Option_'Yes' surged from 32.5c to 45.5c, likely due to new long-range weather model runs again hinting at potential subtropical cyclogenesis, triggering speculative buying. Mar 29, 2026 - Apr 2, 2026, the price of Option_'Yes' surged from 12.5c to 40.5c, likely due to phantom subtropical cyclogenesis signals in long-range weather models (like the GFS, common in spring), triggering renewed speculative buying. Mar 27, 2026 - Mar 29, 2026, the price of Option_'Yes' plummeted from 40.0c to 12.5c, as previous model disturbances completely dissipated, causing a rapid reversion to the climatological baseline. Mar 20, 2026 - Mar 26, 2026, the price of Option_'Yes' fluctuated narrowly between 40.5c and 49c without a clear directional move exceeding 10c. This suggests the market has entered a stalemate, with traders waiting for new weather model signals and a lack of fresh catalysts. Mar 14, 2026 - Mar 20, 2026, the price of Option_'Yes' fluctuated narrowly between 49c and 50c without clear direction. This suggests the market has entered a stalemate following the mid-March volatility, with traders waiting for new weather model signals and a lack of fresh catalysts. Mar 10, 2026 - Mar 13, 2026, the price of Option_'Yes' rebounded from 39.5c to 48c. This movement likely reflects the market re-evaluating potential long-range model disturbances after a brief dip, or buying pressure in a low-liquidity environment, though it did not breach previous highs. Feb 27, 2026 - Mar 5, 2026, the price of Option_'Yes' consolidated narrowly between 40c and 41c, showing no volatility exceeding 10c. This indicates the market entered a 'wait-and-see' phase as the previous model threat was digested and no new signals emerged. Feb 22, 2026 - Feb 23, 2026, the price of Option_'Yes' surged from 31.5c to 49.5c before retracing. This was driven by speculative buying triggered by a short-term signal in weather models (likely GFS) suggesting subtropical genesis, a signal that subsequently faded without realization.