Iran widened its warnings to target buyers of U.S. Treasury bonds, the latest salvo in an intensifying exchange of threats as the war entered its fourth week.

Iran widened its warnings to target buyers of U.S. Treasury bonds, the latest salvo in an intensifying exchange of threats as the war entered its fourth week.

Tensions rise as Iran solidifies control over the Strait of Hormuz while U.S. prepares combat forces amid faltering diplomacy.