Oct 14 (Reuters) - Wall Street's main indexes opened

lower on Tuesday with renewed trade tensions between U.S. and

China souring sentiment, while investors also parsed results

from big U.S. banks that kicked off the third-quarter earnings

season.

The Dow Jones Industrial Average fell 195.7 points,

or 0.42%, at the open to 45,871.89. The S&P 500 fell 52.2

points, or 0.78%, to 6,602.49 , while the Nasdaq Composite

dropped 306.6 points, or 1.35%, to 22,388.043.