A trader works on the floor at the New York Stock Exchange in New York City on Sept. 22. (Jeenah Moon/Reuters) Stocks fell sharply on Friday, with the S&P 500 and Nasdaq suffering their biggest one-day percentage declines since April 10, while Treasury yields dropped and the U.S. dollar weakened as comments by U.S. President Donald Trump reignited worries over a U.S.-China trade war. After markets closed on Friday, Trump said he was raising tariffs on Chinese exports to the U.S. to 100 per cent and imposing export controls onRead more