March 18 (Reuters) - U.S. stock indexes opened lower on

Tuesday as worries about the impact of U.S. tariffs and their

impact on economic growth prevailed ahead of a monetary policy

decision from the Federal Reserve.

The Dow Jones Industrial Average fell 119.47 points,

or 0.29%, to 41,722.16, the S&P 500 lost 26.22 points, or

0.46%, to 5,648.90, and the Nasdaq Composite lost 150.30

points, or 0.84%, to 17,658.36 at the opening bell.