Donald Trump's trade advisers were finalising plans on Wednesday for the reciprocal tariffs the U.S. president has vowed to impose on every country that charges duties on U.S. imports, ratcheting up fears of a widening global trade war.

President Donald Trump could sign an order as soon as Wednesday to require that U.S. tariffs on imports match the tax rates charged by other countries.

President Donald Trump’s desire to get even on countries by matching tariffs they have on American goods could come at a steep cost.