KEEPING SCORE: The Dow Jones industrial average lost 357 points, or 2.1 percent, to 16,177 as of 10:02 a.m. Eastern time. The Standard & Poor's 500 index lost 41 points, or 2.1 percent, to 1,931 and the Nasdaq composite fell 83 points, or 2.8 percent, to 4,691.
