U.S. Stocks Open Lower Amid Oil Slide, Greece Worries

U.S. stocks opened lower on Thursday as investors remained cautious in the wake of a renewed oil slump and uncertainty around the Greece debt negotiations. The impasse between Greece and is creditors continued, after Germany rejected Greece's request for a six-month loan extension agreement. Better-than-expected jobless claims did little to alleviate investor fears. The S&P 500 opened 6 points, or 0.3%, lower at 2,093. The Dow Jones Industrial Average opened down 73 points, or 0.4%, to 17,955. The Nasdaq Composite began the day down 4 poins, or 0.1%, at 4,902.