US Expands Iran Sanctions, Threatens Global Financial Isolation

The United States announced a major expansion of its sanctions campaign against Iran on August 24, 2026, warning countries and companies worldwide that they must sever economic ties with Tehran or risk being cut off from the dollar-based financial system. The move, described by Treasury Secretary Scott Bessent as an "economic D-Day," aims to cripple the Iranian government's revenue streams as a nearly six-month-old conflict continues to disrupt energy markets and regional stability.

Bessent unveiled the measures, dubbed "Operation Economic Outcast," stating the objective was to "sever every economic lifeline that sustains this tyrannical regime." The Treasury Department simultaneously imposed new sanctions on nearly 60 individuals, entities, and vessels linked to Iran's nuclear, missile, cyber, and oil networks. A central element is the threat of secondary sanctions, which could penalize foreign entities for doing business with Iran by excluding them from the dollar-based financial system. Bessent indicated that President Donald Trump has been personally calling foreign leaders to demand they halt transactions with Tehran, but emphasized that Washington was initially giving...