Wall Street opens higher on M&A flurry

U.S. stocks opened higher on Monday as four M&A deals in the biotech sector lifted market sentiment after the worst weekly decline for the S&P 500 in two months.

The Dow Jones industrial average rose 105.5 points, or 0.6%, to 17,818.16, the S&P 500 gained 9.5 points, or 0.46%, to 2,070.52 and the Nasdaq Composite added 31.30 points, or 0.64%, to 4,922.52.