There was also some deal news for investors to focus on. Trading was closed in the U.S. on Monday in observance of the Labor Day holiday.
KEEPING SCORE: The Standard & Poor's 500 index rose 30 points, or 1.6 percent, to 1,952 as of 10:03 a.m. Eastern. The Dow Jones industrial average climbed 279 points, or 1.7 percent, to 16,381. The Nasdaq composite gained 88 points, or 1.91 percent, to 4,771.