Reuters reports that U.S. stocks opened lower on Monday following an unexpected fall in revenue by Citigroup. The decline adds to fears of a more drastic slowdown in global economic growth that resurfaced after evidence of an unexpected drop in China’s trade. The trade data from China served as a reinforcement for concerns over U.S. tariffs on Chinese goods impacting the world’s second-largest economy. The Dow Jones Industrial Average was down 132.35 points, while the S&P 500 was down 16.34 points.