The Dow slipped, but stocks mostly rose after a holiday weekend. It was quiet; traders had little news to react to. Health care and pharmaceutical stocks rose far more than the rest of the market after drug maker Actavis (up 5%) said it’s buying Forest Laboratories (up 28%) for $25 billion. Last week, Comcast announced a deal to buy Time Warner Cable for $45 billion, and Suntory Holdings last month said it was buying Beam, the whiskey maker, for $13.9 billion. Investors should expect more big deals this year, said Mike Serio, at Wells Fargo Private Bank. Stocks have turned around after a rough start to 2014. The S&P 500 was up seven of the last eight days.