Traders assign a 92.5% probability to no megaquake (magnitude 8.0+) by August 31 because these great earthquakes occur globally at an average rate of roughly one per year, with substantial year-to-year variability and no current foreshock sequences or elevated alerts from agencies such as the USGS or Japan Meteorological Agency. Recent 2026 activity has included several magnitude 7+ events, but none approaching the threshold or showing stress transfer patterns likely to trigger an immediate M8+. The short remaining window further compresses odds under Poisson-like occurrence models used in seismic hazard assessment. A realistic challenge could arise from rapid intensification of aftershock activity following a large regional quake or unrecognized slow-slip events along subduction zones such as the Nankai Trough, though official monitoring shows no such precursors at present.