The overwhelming 97.7% market-implied probability for no magnitude 8.0+ megaquake by August 31 stems from the statistical rarity of such events and the absence of any USGS-detected precursors or elevated alerts in the final week. Global catalogs record roughly one M8+ quake annually on average, with short-term forecasting impossible due to the stochastic nature of fault rupture; current seismic swarms and recent M7+ events in Indonesia and elsewhere show no signs of stress transfer capable of triggering an immediate great quake on major subduction zones. While an unforeseen aftershock sequence exceeding the mainshock magnitude remains a remote wildcard, ongoing USGS monitoring and the lack of foreshock patterns or model consensus for rapid intensification reinforce trader consensus against occurrence before the resolution window closes.