Wall Street turbulence returns as weak China data magnifies fear

Turmoil returned to Wall Street on Tuesday after a brief rest, with renewed concerns about China's economy pushing major indexes down almost 3 percent and intensifying fears of a long-term selloff. The S&P 500 is now 10 percent lower than its May record high, with the prospect of slowing global growth and an impending U.S. interest rate hike curtailing a robust bull run that saw the index gain over 200 percent from the depths of the financial crisis in 2009. Tuesday's was the S&P's worst