Wall Street shudders as U.S.-China trade war intensifies

All three major U.S. indexes lost ground in a widespread sell-off, with the tech-heavy Nasdaq posting its biggest one-day percentage loss this year.The S&P 500 and the Dow both had their largest percentage drop since Jan 3.China said it would impose higher tariffs on $60 billion in U.S. goods despite President Donald Trump's warnings not to retaliate against additional tariffs on Chinese imports announced by the White House on Friday.