The S&am Index for the U.S. stock market slipped below 5,500 for the first time since December 2014. On Friday, the S&s was down 0.8 percent, while the Nasdaq composite index slipped 1.5 percent to 3,878.10.The Dow Jones Industrial Average also dropped 0.3 percent, with the S.P. 500 down 1.2 percent and the Nasd up 0.2.The…