U.S. President Donald Trump has issued a stark warning to the global trading system, signaling a 25% tariff on any country that continues commercial ties with Iran. The threat, described by Trump as “final,” has sent ripples through international markets despite the absence of a formal executive order or legal framework. Washington has indicated that trade penalties could be imposed immediately on nations doing business with Tehran, even as questions mount over how such a policy would be enforced. Analysts note that the economic burden of the proposed tariffs would largely fall on U.S. importers, given Iran’s long-standing status under international sanctions. WATCH