President Donald Trump's plans for 100% tariffs on computer chips that aren't made in the U.S. are stoking confusion among businesses and trading partners — boosting stocks for leading semiconductor companies while leaving smaller producers scrambling to understand the implications.
The U.S. imports a relatively small number of chips because most of the foreign-made chips in a device — from an iPhone to a car — were already assembled into a product, or part of a product, before it landed in the country.
