Iran faces 'greatest financial offensive ever', says US treasury secretary

# Analysis The Treasury Department's declaration of "total financial isolation" represents a fundamental shift in how the US weaponizes its control over the global banking system, moving beyond targeted sanctions to threaten any institution—from European banks to Asian insurers—that conducts routine business with Iran. This strategy exploits America's dominance in dollar-denominated transactions and SWIFT access, forcing multinational corporations and financial institutions worldwide into binary choices: either abandon Iranian operations entirely or risk exclusion from US markets and the dollar system itself. The approach carries significant destabilizing potential, as secondary sanctions on this scale can fracture the international financial architecture that has underpinned global trade, potentially encouraging adversaries and even US allies to develop alternative payment systems that reduce long-term dependence on American financial infrastructure. The real economic impact will depend on enforcement consistency and whether major trading nations comply or move to circumvent the sanctions regime, but the precedent of using financial isolation as a near-total foreign policy tool marks a departure from the surgical sanctions of previous decades.