FXstreet.com (Córdoba) - US stocks opened sharply lower on Thursday, retreating after two days of gains, amid skepticism the Summit of European Union leaders could bring any concrete solution to tackle the worsening euro zone crisis.

The Dow Jones industrial average lost 98 points, or 0.78%, to 12,528. The S&P 500 Index dropped 8 points, or 0.66%, to 1,323. The Nasdaq Composite fell 21 points, or 0.76%, to 2,853.

Investors showed little reaction to US data that showed initial jobless claims fell by 6K to 386K last week, while Q1 GDP revision came in line with expectations at 1.9%.

European stocks were broadly lower, with the Stoxx Europe 600 index down 0.9%, as the summit gets underway. Gold lost 1.0% to $1562 an ounce, while crude-oil futures dropped 0.7% to $79.62 a barrel.