U.S. Stocks Open Weaker On Greece Concerns

U.S. stocks opened weaker on Friday as the continued deadlock in Greek debt talks turned investors cautious. The main indexes were still on track to post modest weekly gains. The S&P 500 opened 2 points, or 0.1%, lower at 2,119. The Dow Jones Industrial Average slipped 26 points, or 0.2%, to 18,092. The Nasdaq Composite began the day up 4 points, or 0.1% at 5,137, setting intraday record.