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 slipped 447.27 points or 0.97% to 45,620.31, the S&P 500 fell 81.28 points or 1.22% to 6,573.41, while the Nasdaq dropped 408.56 points or 1.80% to 22,286.04.