A trader points up at a display on the floor of the New York Stock Exchange

 
A trader points up at a display on the floor of the New York Stock Exchange
A trader points up at a display on the floor of the New York Stock Exchange August 20, 2012. Health insurer Aetna Inc said on Monday that it would buy rival Coventry Health Care Inc for $5.6 billion to increase its share of the fast-growing, U.S. government-backed Medicare and Medicaid programs. REUTERS/Brendan McDermid