Nov 6 (Reuters) - Wall Street's main indexes opened

lower on Thursday, as investors digested a slate of corporate

earnings, while concerns around U.S. tariffs, surging valuations

and mixed economic data kept investors on edge.

The Dow Jones Industrial Average fell 55.9 points, or

0.12%, at the open to 47,255.12. The S&P 500 fell 8.7

points, or 0.13%, at the open to 6,787.59​, while the Nasdaq

Composite dropped 38.5 points, or 0.16%, to 23,461.289

at the opening bell.