NEW YORK — An escalating trade war between the U.S. and China pushed stocks lower for a fifth straight day Friday on Wall Street and put the market on track for its worst week of the year.The U.S. pulled the trigger on higher tariffs on $200 billion worth of Chinese goods even as both sides continued to negotiate. President Donald Trump said in a tweet Friday morning that “there is absolutely no need to rush” on making a deal.Technology and industrial stocks had some of the biggest declines as investors fled to lower-risk holdings liked utilities and real estate stocks. Several companies with substantial revenue in China fell. Apple and Micron fell 3%. Boeing shed 1.2% and Caterpillar fell 2%.The higher tariffs from the U.S. and China’s response that it would take “necessary countermeasures” rattled investors who had been hoping for a quick resolution to the dispute. Confidence in that outcome had eased investors’ concerns this year, along with a more patient Federal Reserve and solid economic data. It all added up to help push stocks to their hottest start to a year in decades.The sharp decline this week also ramped up the volume on what has been a mostly muted year with no major market-moving news. Investors have been cautiously watching corporate earnings, but have been mostly surprised by solid results.