U.S. stocks climbed Monday as mergers and acquisitions -- led by AT&T's (T) - Get Report blockbuster agreement to buy Time Warner (TWX) -- and earnings reports dominate market movement, while positive manufacturing data also gave a boost. AT&T's shares fell after it agreed to buy Time Warner in an $85.4 billion deal announced this weekend. The telecommunications company still has to pass regulatory approval amid politician's negative rhetoric surrounding the deal. T-Mobile's (TMUS) - Get Report shares jumped after reporting adjusted earnings of $0.27 a share, beating estimates of $0.21 a share. The mobile communications service company said total revenue increase 17.8% to $9.2 billion and it added 2 million customers during the quarter. And in a deal valued at $6.4 billion, Rockwell Collins (COL) agreed to acquire B/E Aerospace (BEAV) . Rockwell Collins is trying to increase its exposure to the commercial aircraft cabin. On the deal news, Rockwell Collins stock fell, while B/E Aerospace shares jumped. TheStreet's Valerie Young has details from Wall Street.