The unwinding of some of Wall Street's most popular trades intensified, handing Japanese stocks their worst day since the 1987 market crash and walloping U.S. tech shares. The S&P 500, Nasdaq and Dow shed 3%, 3.4% and 2.6%, respectively.

The unwinding of some of Wall Street’s most popular trades intensified, handing Japanese stocks their worst day since the 1987 market crash and walloping U.S. tech shares. The S&P 500, Nasdaq and Dow shed 3%, 3.4% and 2.6%, respectively.