May 20 (Reuters) - Wall Street's main indexes opened

lower on Tuesday as investors awaited commentary from Federal

Reserve officials through the day to assess the potential impact

of U.S. President Donald Trump's tariffs in the second half of

2025.

The Dow Jones Industrial Average fell 57.0 points, or

0.13%, at the open to 42735.11. The S&P 500 fell 18.9

points, or 0.32%, at the open to 5944.66​, while the Nasdaq

Composite dropped 83.4 points, or 0.43%, to 19132.057 at

the opening bell.