Bolsa, mercados y cotizaciones
S&P 500 posts biggest gain since Jan 2013; tech leads
The Dow Jones industrial average rose 421.28 points, or 2.43 percent, to 17,778.15, the S&P 500 gained 48.34 points, or 2.4 percent, to 2,061.23 and the Nasdaq Composite added 104.08 points, or 2.24 percent, to 4,748.40.
(Reporting by Caroline Valetkevitch; Editing by Nick Zieminski)