US Tightens Iran Sanctions as Tehran Warns of Retaliation, Hormuz Crisis Deepens

Washington has intensified economic pressure on Tehran as the United States seeks to force Iran to end the conflict and reopen the Strait of Hormuz, while Tehran has warned of retaliation.

US Treasury Secretary Scott Bessent on August 24 announced “Operation Economic Outcast”, aimed at isolating Iran economically. The United States sanctioned nearly 60 individuals, entities and vessels linked to Iran’s oil smuggling, nuclear and missile procurement and cyber activities. Washington warned countries continuing to do business with Iran that they could face secondary sanctions and potentially lose access to the dollar-based financial system. Bessent said no country or institution would be beyond US sanctions, although major Chinese financial institutions were not immediately targeted.

Iran has rejected the expanded measures, calling Washington’s sanctions unlawful. Iranian officials have warned that further US escalation could provoke a “devastating” response. Tehran has also signalled that sanctions relief would be important for any renewed negotiations.

President Donald Trump has separately threatened tougher economic action. On August 20, he warned that Iran could face what he called the “most crushing economic operation” if it failed to reach a deal. The administration’s latest approach represents a shift toward economic pressure after months of military confrontation and unsuccessful negotiations.

The standoff is closely tied to the Strait of Hormuz, a vital energy chokepoint through which a substantial share of global oil and gas shipments normally passes. Shipping has fallen sharply amid the conflict, raising concerns over global energy supplies, freight costs and global prices.

The pressure campaign faces a major challenge from China, Iran’s biggest trading partner and oil buyer. Former US Secretary of State Hillary Clinton said China and India could use energy ties with Tehran to encourage Iran to reopen the strait and pursue diplomacy. She argued that Beijing has significant diplomatic leverage because of its dependence on Iranian energy.

With sanctions tightening, Iran threatening retaliation and shipping remains disrupted, the crisis now hinges on whether economic pressure can produce negotiations or instead deepen confrontation.