Wall Street pulled down by tech, auto stocks

Wall Street fell on Tuesday, with the S&P 500 and the Nasdaq having their worst day in more than a month, following weak economic data and losses in technology and consumer discretionary stocks. Shares of Ford and General Motors dropped about 3.5 percent each after the two major U.S. automakers reported July vehicle sales slightly below expectations. The stocks dragged down the S&P consumer discretionary index by 1.4 percent, making it the biggest loser among the 10 major S&P indexes