Shares of Gilead Sciences Inc. slipped 4.28% to $109.64 Friday, on what proved to be an all-around dismal trading session for the stock market, with the S&P 500 Index falling 0.33% to 6,259.75 and Dow ...

What Happened? A number of stocks fell in the afternoon session after the U.S. administration announced a sharp escalation in trade tensions by threatening new tariffs on Canada. The wider market ...