The near-certain trader consensus on "No" for Iranian regime change by October 31 stems from the extremely compressed timeline, entrenched security structures under the Revolutionary Guards, and ongoing leadership continuity efforts following Supreme Leader Ali Khamenei's killing roughly one week ago. Recent U.S. and Israeli strikes have exposed factional strains and prompted a new defense minister appointment, yet the regime has sustained command over coercive institutions and navigated succession processes without systemic breakdown. Economic pressures and earlier 2026 protests have not produced coordinated challenges capable of rapid overthrow. While further high-level targeting or sudden elite defections could theoretically alter trajectories within days, verifiable patterns from sustained external campaigns indicate the barriers to collapse remain substantial in this narrow window.