Stocks fell for a second day this week as investors became more cautious on the outlook for global economic growth.
Crude oil fell, pushing energy stocks lower. Bank of America's earnings disappointed and Apple fell to its lowest in a year and a half after a supplier hinted at a slowdown in iPhone and iPad production.
The Dow Jones industrial average fell 138.19, or 0.9 percent, to close at 14,618.59.
The S&P 500 index dropped 22.56 points, or 1.4 percent, to 1,552.01.
The Nasdaq composite declined 59.96 points, or 1.8 percent, to 3,204.67.
For the week:
The Dow is down 246.47 points, or 1.7 percent.
The S&P 500 is down 36.84 points, or 2.3 percent.
The Nasdaq is down 90.28 points, or 2.7 percent.
For the year:
The Dow is up 1,514.45 points, or 11.6 percent.
The S&P 500 is up 125.82 points, or 8.8 percent.
The Nasdaq is up 185.16 points, or 6.1 percent.