Industrial and technology companies and retailers all stumbled Monday as U.S. stocks began the week with losses. General Electric suffered its worst one-day loss in six years following downgrades from analysts.

On Monday:

The Standard & Poor’s 500 index gave up 10.23 points, or 0.4 percent, to 2,564.98.

The Dow Jones industrial average slid 54.67 points, or 0.2 percent, to 23,273.96.

The Nasdaq composite retreated 42.23 points, or 0.6 percent, to 6,586.83.

The Russell 2000 index of smaller-company stocks sagged 11.75 points, or 0.8 percent, to 1,497.49.

For the year:

The S&P 500 is up 326.15 points, or 14.6 percent.

The Dow is up 3,511.36 points, or 17.8 percent.

The Nasdaq is up 1,203.71 points, or 22.4 percent.

The Russell 2000 is up 140.36 points, or 10.3 percent.