Trader Peter Costa works on the floor of the New York Stock Exchange Monday, April 28, 2014. Stocks are mostly higher in early trading as traders hope for another blockbuster merger in the health-care... more 
Trader Peter Costa works on the floor of the New York Stock Exchange Monday, April 28, 2014. Stocks are mostly higher in early trading as traders hope for another blockbuster merger in the health-care industry. (AP Photo/Richard Drew) less 
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Associated Press | Photo By Richard Drew
Mon, Apr 28, 2014 11:00 AM EDT