Stocks closed sharply lower Monday as an escalating trade war between the U.S. and China rattled Wall Street.

Technology companies, which would stand to lose greatly in an extended trade battle, led the broad sell-off. The losses handed the benchmark S&P 500 index its biggest loss since January.

On Monday:

The S&P 500 index fell 69.53 points, or 2.4%, to 2,811.87.

The Dow Jones Industrial Average dove 617.38 points, or 2.4%, to 25,324.99.

The Nasdaq composite slid 269.92 points, or 3.4%, to 7,647.02.

The Russell 2000 index of small company stocks lost 49.99 points, or 3.2%, to 1,523.

For the year:

The S&P 500 is up 305.02 points, or 12.2%.

The Dow is up 1,997.53 points, or 8.6%.

The Nasdaq is up 1,011.75 points, or 15.2%.

The Russell 2000 is up 174.44 points, or 12.9%.