The slight trader lean toward “No” on Iranian regime collapse by October 31 reflects the Islamic Republic’s demonstrated resilience following Supreme Leader Ali Khamenei’s February 2026 assassination and the subsequent leadership transition to Mojtaba Khamenei. Recent developments include Iranian attacks on shipping in the Strait of Hormuz on September 29–30, renewed campus protests over compulsory hijab and economic hardship on September 29, and parallel government-organized rallies signaling continued security-force cohesion. Ceasefire talks mediated by Qatar continue amid sanctions-driven inflation and supply shortages, yet no verified elite defections or nationwide uprising have materialized in the past month. A rapid shift in odds would require either a major military escalation that fractures internal command structures or a sudden surge in coordinated domestic unrest large enough to overwhelm repression before month-end.