US STOCKS-Wall St rebounds from recent losses; deals help
* M&A deal lifts sentiment; biotech coming off big weekly decline
* UnitedHealth unit to buy Catamaran; Horizon to buy Hyperion
* Indexes up: Dow 1.5 pct, S&P 1.2 pct, Nasdaq 1.2 pct (Updates to close)
By Caroline Valetkevitch
NEW YORK, March 30 (Reuters) - U.S. stocks climbed more than 1 percent on Monday, rebounding from a sharp decline last week, helped by deal activity in healthcare and a bounce in energy shares.
Also boosting investors' risk appetite, Chinese stocks surged to seven-year highs, helped by hopes for more infrastructure spending and monetary policy easing.
The Dow registered its biggest daily percentage gain since Feb. 3 and all 10 primary S&P 500 sectors rose on the day, led by energy, which jumped 2.1 percent despite a slight decline in Brent and U.S. oil prices.
"(The rally) sort of seems to be global growth based right now: the Chinese economy is falling but they're going to stimulate," said Uri Landesman, president of Platinum Partners in New York.
M&A activity has helped boost equities, especially shares of smaller companies, Landesman said. "That's been a theme of this market on and off for a very long time." Continuación...