Financial markets suffered a rerun of their swoon in April, when “Liberation Day” tariffs shocked global investors, signaling that his latest China duties may end up hurting the U.S. more than their intended target. On Friday, President Donald Trump said he will impose an additional 100% tariff on China and limit U.S. exports of software, after China restricted its exports of rare earths. The S&P 500 sank 2.7%, its worst selloff since April 10. Meanwhile, the U.S. dollar index plunged nearly 0.7% as Trea ...