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 (UNITED STATES - Tags: BUSINESS HEALTH LOGO) - RTR36ZMH
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