Stocks jump on euro and energy shares
* The Dow Jones industrial average gained 273.28 points, or 2.76 percent, to end unofficially at 10,172.53. The Standard & Poor's 500 Index jumped 31.15 points, or 2.95 percent, to finish unofficially at 1,086.84. The Nasdaq Composite Index climbed 59.86 points, or 2.77 percent, to close unofficially at 2,218.71.
(Reporting by Leah Schnurr; Editing by Jan Paschal)