The dominant driver of the 93.8% market-implied probability for “No” is the extreme rarity of magnitude 9.0+ earthquakes combined with the brief remaining window until December 31, 2026. Globally, such events occur roughly once to three times per century on average, tied to long recurrence intervals of several hundred years along major subduction zones, with the most recent being the 2011 Tohoku event. In 2026, the largest recorded earthquakes have reached only 7.8, consistent with USGS data showing no recent precursors or clustering that would elevate odds of an imminent megathrust rupture. Traders’ strong consensus reflects this base rate plus the inability of current seismic monitoring to forecast exact timing. A realistic challenge would require an unexpected full-margin rupture in a high-strain zone such as Cascadia or southern Chile within the next four months, an outcome that remains statistically remote given historical patterns and the absence of anomalous foreshock activity.