The overwhelming 99.2% market-implied odds against a magnitude 10.0 or greater earthquake before 2027 reflect the U.S. Geological Survey's established assessment that no fault long enough to generate such an event exists on Earth. Magnitude scales with rupture length and slip, and the record maximum remains the 9.5 Valdivia quake of 1960 along a roughly 1,000-mile Chilean subduction zone; theoretical M10 events would require planetary-scale faults that do not occur. Ongoing USGS seismic monitoring and global networks confirm no precursors or tectonic conditions approaching this threshold in the brief remaining window. While hypothetical revisions to magnitude scaling relations or entirely unforeseen fault behavior could theoretically alter outcomes, current observational data and physical constraints render such shifts highly improbable before 2027.