A sharp sell-off will start the week on Wall Street after President Donald Trump said on Sunday that the U.S. will hike tariffs on goods imported from China, casting doubt on recent optimism that the world’s two largest economies were close to a resolution to their trade battle. Dow Jones Industrial Average futures lost 400 points after falling as much as 479 points earlier Sunday evening. S&P 500 futures dropped 1.3% shortly after their open Sunday evening, while Nasdaq-100 Index futures dropped 1.5%. Trump said in a tweet Sunday afternoon that the current 10% levies on $200 billion worth of...