The extreme rarity of magnitude 9.0 or greater earthquakes drives the 93.3% market-implied probability for no such event before 2027. Historical records from the USGS show only four events of this scale worldwide since 1900, occurring roughly once every few decades along major subduction zones where tectonic plates converge. Current seismic monitoring reveals no accelerating strain accumulation or foreshock patterns that would indicate an imminent megathrust rupture capable of reaching this threshold on the moment magnitude scale. While realistic scenarios such as an unexpected full rupture along the Cascadia or Japan Trench could still produce a 9.0-plus quake, ongoing USGS data and global seismic networks show stable background activity without the precursors needed to shift consensus before year-end.