US stock open in the red: S&P down 0.3%, Nasdaq slips 0.5%

US stocks opened mixed on Tuesday, with the S&P 500 and Nasdaq slipping as investors grew uneasy over the lack of progress on global trade negotiations. The S&P 500 fell 0.3%, while the Nasdaq Composite lost 0.5%. The Dow Jones Industrial Average, however, managed a modest gain, adding 96 points or 0.2%. Markets turned lower […]