The U.S. announced a major expansion of economic sanctions against Iran and foreign companies that continue to trade with Tehran [1, 2].

This escalation increases the financial risk for any nation or business purchasing Iranian oil, effectively attempting to isolate the Iranian economy from the global banking system.

U.S. Treasury Secretary Scott Bessent announced the new round of sanctions in Washington, D.C. [1, 3]. The measures target Iranian entities, as well as foreign companies, banks, and businesses that maintain trade relations with the Iranian government [1, 4].

Bessent said the move was the "greatest financial offensive" [1]. He also said the campaign was an "economic onslaught" [3] and an "economic D-Day" [2].

The Treasury Department said the goal is to increase pressure on Tehran for defying previous U.S. sanctions [1, 3]. By targeting the partners of the Iranian government, the U.S. aims to raise the stakes for countries that continue to buy Iranian oil [2, 3].

The announcement comes as the U.S. seeks to curb Tehran's ability to fund its operations through energy exports [1, 3]. The expanded sanctions package creates a broader net of prohibited transactions, threatening secondary sanctions against any third-party entity that facilitates Iranian trade [4].

"greatest financial offensive"

The shift toward 'secondary sanctions' means the U.S. is no longer just targeting Iran, but is actively penalizing the global infrastructure that allows Iran to bypass trade restrictions. By framing this as a financial offensive, the Treasury Department is signaling a strategy of total economic isolation to force a change in Tehran's policy regarding oil exports and sanctions defiance.