Bolsa, mercados y cotizaciones
Wall Street up at open on energy, weak dollar
The Dow Jones industrial average gained 31.21 points, or 0.32 percent, to 9,896.15. The Standard & Poor's 500 Index gained 3.57 points, or 0.33 percent, to 1,075.06. The Nasdaq Composite Index gained 9.17 points, or 0.43 percent, to 2,148.45.