Traders assign only a roughly 6% chance of a magnitude 9.0 or greater earthquake before 2027 because USGS historical catalogs show such megathrust events occur globally only a handful of times per century, with an annual base rate typically estimated between 6% and 12%. Just five months remain in the window, and no subduction-zone monitoring data from agencies like the USGS indicate elevated strain or foreshock activity capable of producing a great earthquake on that timescale. While sudden rupture along major faults such as the Cascadia or Japan Trench remains theoretically possible, the short horizon and absence of precursor signals keep the market-implied odds heavily weighted toward “No.”