Wall Street has a new shorthand about President Donald Trump — and he’s not happy about it. Traders have reportedly come up with the acronym TACO, which stands for “Trump always chickens out,” to describe the tumultuous trade environment created by the president’s habit of threatening to impose tariffs on countries,

Tariffs were a defining promise of President Donald Trump's campaign, and they have been a defining feature of his second term in office. But just over five months in, many of his tariff proclamations haven’t turned into reality.

Wall Street's main indexes were under pressure on Friday as U.S. President Donald Trump accused China of violating a tariff agreement, ramping up tensions in a bruising trade war and clouding the last day of an otherwise strong month for equities.