By the close, the Dow Jones industrial average had plunged 44.55 points, to 2,857.18.

The Dow Jones industrial average plunged 43.77 points, or 2.26 percent, to close below 1,900.

At the same time, the Dow transportation average plunged 27.92 points, to 1,163.23, as airline stocks came under further pressure.

The Dow Jones industrial average plunged 225.43 points, to 10,598.47.

The Dow Jones industrial average plunged 96.24 points, or 2.43 percent, to close at 3,871.42.

The Dow Jones industrial average plunged 77.42 points, to 1,950.43.

The Dow Jones industrial average plunged 96.24 points, or 2.43 percent.

The Dow transportation average plunged 17.60 points, to 1,448.26.

The Dow Jones industrial average plunged 156.83 points, to 1,793.93, its second worst point loss ever.

Last week, the Dow Jones utility average plunged 13.51 points, or 5.6 percent, to 227.26.