Meanwhile, the U.S. Senate on Sunday passed a sweeping $430 billion bill intended to fight climate change, lower drug prices and raise some corporate taxes.
Signify Health Inc jumped 14.8% on a media report that CVS Health Corp was looking to buy the health technology company.
At 9:50 a.m. ET, the Dow Jones Industrial Average was up 256.40 points, or 0.78%, at 33,059.87, the S&P 500 was up 35.81 points, or 0.86%, at 4,181.00, and the Nasdaq Composite was up 163.05 points, or 1.29%, at 12,820.61.
Palantir Technologies Inc dropped 13.2% after the data analytics software company lowered its annual revenue forecast as the timing of some large government contracts remained uncertain.