US President Donald Trump has said he would impose an additional 100% tariff on imports from China from next month.
In a post on social media, Trump said the US would also put export controls on critical software.
In an earlier post on Friday, he hit back at Beijing’s move this week to tighten its rules for exports of rare earths, accusing China of “becoming very hostile” and trying to hold the world “captive”.
He threatened to pull out of a meeting with China’s President Xi Jinping. He later said he had not cancelled it, but that he did not know “that we’re going to have it”.
“I’m going to be there regardless,” he told reporters at the White House.
Financial markets dropped in the wake of Trump’s remarks, with the S&P 500 closing down 2.7%, its steepest fall since April.
China dominates production of rare earths and certain other key materials, which are key components in cars, smartphones and many other items.
The last time Beijing tightened export controls – after Trump raised tariffs on Chinese goods early this year – there was an outcry from many US firms reliant on the materials. Carmaker Ford even had to temporarily pause production.
In addition to tightening rules for rare earth exports, China has opened a monopoly investigation into the US tech firm Qualcomm that could stall its acquisition of another chipmaker.
(BBC)