Tech companies lead another steep sell-off in U.S. stocks

Traders work on the floor of the New York Stock Exchange.
Specialist Peter Mazza, left, and trader Anthony Carannante work on the floor of the New York Stock Exchange, Wednesday, Oct. 24, 2018. The Dow Jones Industrial Average plummeting more than 600 points and extending a losing streak for the benchmark S&P 500 index to a sixth day.
Richard Drew | AP