US stocks today: Wall Street mixed as earnings season heats up; GM, Halliburton lead gains
File photo (Picture credit: AP) Wall Street opened on a mixed note on Tuesday as investors assessed a wave of strong corporate earnings amid concerns about stretched valuations. The Dow Jones Industrial Average rose 0.1 per cent to 46,757.20, while the S&P 500 slipped 0.1 per cent to 6,731.14 and the Nasdaq Composite declined 0.3…