Companies that do well as the economy improves led stocks higher after several posted strong earnings. Coach, a maker of luxury handbags, and Netflix were big winners. Financial stocks rose after Travelers’ earnings beat expectations. The markets closed higher even after markets were shaken when a fake Associated Press tweet said explosions at the White House had injured the president. The Dow plunged but snapped back within five minutes. After the sell-off, investors turned their focus back to earnings. Tuesday’s upturn put both the Dow and S&P 500 back in the black for April and closer to the record highs they hit April 11.