The 99% market-implied probability for a 5.5–5.6 magnitude event on September 29, 2026, aligns with USGS recordings of a confirmed M5.6 quake along the southern Mid-Atlantic Ridge at 13:06 UTC as the day's largest. This outcome reflects standard global seismic monitoring, where networks detect and catalog events using moment magnitude scales, with no higher-magnitude activity reported in active zones such as subduction margins or transform faults. Historical patterns show isolated M5–6 quakes occur frequently without triggering larger sequences, supporting trader consensus around this narrow band. Resolution could shift only if post-event revisions alter the peak magnitude or if an unreported aftershock exceeds 5.6 before the daily close.