Stock Trading

Stocks ended a disappointing January with a loss Friday as investors questioned whether the economy will be able to sustain its big fourth-quarter growth rate. Downbeat earnings at technology companies also pulled stocks down. The Dow Jones closed the month with a loss of 3.5 percent, and is now down 658.10, or 6.1 percent, since reaching a 15-month high of 10,725.43 on Jan. 19.

The Dow Jones industrial average fell 53.13, or 0.5 percent, to 10,067.33.

The Standard & Poor's 500 index fell 10.66, or 1 percent, to 1,073.87.

The Nasdaq composite index fell 31.65, or 1.5 percent, to 2,147.35.

For the week:

The Dow is down 105.65, or 1 percent.

The S&P is down 17.89, or 1.6 percent.

The Nasdaq is down 57.94, or 2.6 percent.

For the year:

The Dow is down 360.72, or 3.5 percent.

The S&P is down 41.23, or 3.7 percent.

The Nasdaq is down 121.80, or 5.4 percent.