Trader consensus favoring no Iranian nuclear weapon before 2027 reflects the cumulative effects of 2025 and early 2026 U.S.-Israeli strikes that damaged key enrichment sites at Natanz, Fordow, and Isfahan, leaving much of Iran’s stockpile of roughly 400 kilograms of 60-percent enriched uranium buried or inaccessible without IAEA verification. Recent satellite imagery from September 2026 shows defensive reinforcements at the Pickaxe Mountain tunnel complex and reconstruction activity at Parchin, yet no confirmed resumption of large-scale enrichment or weaponization. A June 2026 U.S.-Iran memorandum on stockpile down-blending collapsed within weeks, leaving diplomatic channels stalled and Russia and China blocking renewed UN monitoring measures. While internal Iranian debates continue over NPT withdrawal or breakout options, the combination of physical setbacks, restricted inspector access, and external pressure has kept the program in a largely dormant state. A rapid shift remains possible if Tehran successfully reconstitutes cascades at hardened sites or diverts existing material before 2027.