If no deal is made, Japanese imports face a 25 percent tariff from Trump, which threatens to drive up prices in the U.S. on affected goods. Japan mostly exports vehicles, machinery, and electronics to the U.S. It also risks damaging relations with a key Pacific ally of Washington.

On July 7, Trump announced 25% tariffs on imports from Japan and South Korea, effective August 1. He also announced separate rates for a number of other countries. On Tuesday, he said letters would be going out soon to dozens of smaller countries notifying them their goods would face a tariff rate of over 10%.

Why stocks are mostly shrugging off his latest threats.