The stock prices of Morgan Stanley, UnitedHealth Group and others sank after they turned in weaker quarterly results. Prices of commodities held steady following a wild couple of days.
The Dow Jones industrial average fell 81.45, or 0.6 percent, to close at 14,537.14.
The Standard & Poor's 500 index lost 10.40 points, or 0.7 percent, to 1,541.61.
The Nasdaq composite fell 38.31 points, or 1.2 percent, to 3,166.36.
For the week:
The Dow is down 327.92 points, or 2.2 percent.
The S&P 500 is down 47.24 points, or 2.9 percent.
The Nasdaq is down 128.59 points, or 3.9 percent.
For the year:
The Dow is up 1,433.00 points, or 10.9 percent.
The S&P 500 is up 115.42 points, or 8.1 percent.
The Nasdaq is up 146.85 points, or 4.9 percent.