Trump threatens economic retaliation against Iran's trading partners

Trump threatens sweeping economic consequences against Iran's trade partners

President Donald Trump announced on Truth Social in the early hours of Thursday that any country providing financial, logistical, or commercial support to Iran would face what he called "TREMENDOUS Economic Consequences" — framing the move as "economic D-Day" and describing it as the most severe economic operation ever directed at a single country.

The announcement came three days after a 60-day ceasefire between the United States, Israel, and Iran expired without a diplomatic resolution to the conflict that began in late February. Trump named no countries directly but listed the mechanisms he intends to shut down: oil smuggling, swap lines, cash transfers, exchange houses, ship registries, and front companies.

China, the largest buyer of Iranian oil, was not named. The Treasury Department had already sanctioned several Chinese teapot refineries since the start of the conflict. The UAE, a day earlier, announced it was severing all financial and economic ties with Iran following the detection of two Iranian ballistic missiles targeting maritime traffic in the Gulf. Iran's armed forces responded by warning Gulf states against providing any support to US military operations.

The scope of the threat — directed at foreign financial institutions, airports, and government entities — extends the pressure campaign Treasury Secretary Scott Bessent previewed last week, when he said economic isolation of Iran would reach a scale the world had not previously seen.

About the analyst

James Harrington

Senior Risk Analyst

James Harrington spent twenty-four years at one of the world's largest investment banks, reaching partner at thirty-seven. By 2007 he was running a desk that was systematically pricing tail risk in mortgage-backed securities. He was right for eighteen months before the crisis arrived.