The market-implied odds heavily favor no 10.0-or-greater earthquake before 2027 because no event of that magnitude has ever been recorded, and geophysical constraints on fault rupture length and slip make such an occurrence extremely improbable on human timescales. USGS historical catalogs show the largest instrumentally measured quake reached only 9.5 in Chile in 1960, with subsequent global maxima rarely exceeding 9.2; seismic moment calculations indicate a 10.0 would require an unrealistically vast rupture zone spanning thousands of kilometers. Ongoing global monitoring networks report no precursors or model runs suggesting rapid escalation, while typical annual frequencies for magnitude 9+ events remain well below one per decade. Traders weigh this established baseline against the slim possibility of an unforeseen megathrust event in the remaining months of 2026.