CVS deal for Aetna could help retailer face Amazon entry: analysts

U.S. pharmacy operator CVS Health Corp'smove to buy health insurer Aetna Inccould shore-up CVS' vulnerable pharmacy business and spur another round of dealmaking in an industry fearing Amazon's arrival, analysts said.Shares of Aetna, the third-largest U.S. health insurer, closed down 3 percent on Friday after closing 12 percent higher on Thursday on reports of the deal.CVS Health was down 5.9 percent.