US stocks open higher as traders watch Europe

U.S. stocks are opening higher as traders await news from Europe.

European finance ministers are meeting to discuss a debt crisis that threatens to engulf several countries. Markets sank in recent months on fears that Greece will fail to pay its debts.

European banks lent billions to Greece. A default by the country would rattle the European financial system.

At 9:35 a.m. Eastern time, the Dow is up 57 points, or 0.5 percent, at 11,490. The S&P 500 is up 6, or 0.5 percent, at 1,215. The Nasdaq is up 10, or 0.4 percent, at 2.617.

Shares rose every day this week, their first four-day winning streak since August.

BlackBerry maker Research in Motion lost more than 20 percent after reporting sharply lower revenue and earnings.