Bolsa, mercados y cotizaciones
Wall Street rises at open, Yellen testimony eyed
The Dow Jones industrial average rose 77.23 points, or 0.47 percent, to 16,478.25, the S&P 500 gained 6.26 points, or 0.34 percent, to 1,873.98 and the Nasdaq Composite added 2.104 points, or 0.05 percent, to 4,082.863.
(Reporting by Chuck Mikolajczak; Editing by Bernadette Baum)