The stock market ended lower Thursday following weaker earnings from banks.
Bank of America fell 5 percent after it reported an 11 percent slide in fourth-quarter net income, hurt by a slowdown in trading revenue.
The Dow Jones industrial average dropped 106.38 points, or 0.6 percent, to 17,320.71.
The Standard & Poor's 500 index fell 18.60, or 0.9 percent, to 1,992.67.
The Nasdaq composite fell 68.50, or 1.5 percent, to 4,570.82.
For the week:
The Dow is down 416.66 points, or 2.4 percent.
The S&P 500 is down 52.14 points, or 2.6 percent.
The Nasdaq is down 133.24 points, or 2.8 percent.
For the year:
The Dow is down 502.36 points, or 2.8 percent.
The S&P 500 is down 66.23 points, or 3.2 percent.
The Nasdaq is down 165.23 points, or 3.5 percent.