A slump in technology shares on Wednesday helped turn early gains in U.S. stocks into losses across a number of industries. Seven of the 10 sectors in the Standard and Poor's 500 index fell. Suppliers of raw materials, the focus of aggressive selling in recent days, rose 3.1 percent.
The Dow Jones industrial average lost 75.70 points, or 0.4 percent, to 17,492.30.
The S&P 500 gave up 15.97 points, or 0.8 percent, to 2,047.62.
The Nasdaq composite dropped 75.38 points, or 1.5 percent, to 5,022.87.
For the week:
The Dow fell 355.33 points, or 2 percent.
The S&P 500 fell 44.07 points, or 2.1 percent.
The Nasdaq dropped 119.40 points, or 2.3 percent.
For the year:
The Dow is down 330.77 points, or 1.9 percent.
The S&P is down 11.28 points, or 0.6 percent.
The Nasdaq is up 286.81 points, or 6.1 percent.