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Dollar Rises as U.S. Expands Iran Sanctions and Announces New Canada Tariffs

AUGUST 25, 2026

Summary

  • U.S. Treasury Secretary Scott Bessent announced an expansion of sanctions against Iran.
  • Renewed U.S.-Canada trade tensions weighed on the Canadian dollar.
  • President Donald Trump said 50% tariffs on vehicles, auto parts and steel will take effect on January 1, 2027.
  • The U.S. dollar recovered after recently falling to a three-month low.

Dollar Strengthens

The U.S. dollar advanced on Monday, recovering after its third weekly decline in four weeks had pushed the currency to three-month lows. The greenback gained after the U.S. administration announced an expansion of sanctions against Iran as well as separate tariffs targeting Canadian goods.

Iran Sanctions

The dollar extended its gains after U.S. Treasury Secretary Scott Bessent announced an expansion of secondary sanctions against Iran. Bessent said the measures were intended to cut Iran's remaining economic lifelines, increasing geopolitical uncertainty and providing some support for demand for the U.S. currency.

Canadian Dollar Under Pressure

The Canadian dollar came under pressure as trade tensions between the United States and Canada intensified. President Trump said the United States would impose 50% tariffs on vehicles, vehicle parts and steel beginning January 1, 2027. The prospect of substantially higher tariffs creates additional uncertainty for Canadian exporters and the broader Canadian economy.

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