Stocks turned negative in late afternoon trading Thursday, closing lower as the excitement over the European Central Bank's surprise cut in its key interest rates faded. Investors are looking ahead to Friday's August jobs report from the Labor Department. PNC Financial's Senior Macro Economist, Gus Faucher says 'the labor market still isn't very tight even though the unemployment number has fallen' and wage growth is an important data to keep an eye on. Energy stocks led the Dow Jones Industrial lower. Both Chevron (CVX) and Exxon Mobil (XOM) closed down nearly 1 percent. GoPro (GPRO) slid more than 6 percent. The stock got a downgrade from JP Morgan noting the stock has more than doubled since its IPO. The firm still kept its estimates and price target. Home Depot (HD) is continuing to investigate a potential data breach. Shares of the home improvement retailer gained 1 percent in today's session.