Teco energy

US stocks open higher, getting a boost from China's rally

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.