(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.