Trader Christopher Lotito, right, works on the floor of the New York Stock Exchange, Friday, March 21, 2014. An early gain on the stock market was mostly gone Friday afternoon, weighed down by ... more 
Trader Christopher Lotito, right, works on the floor of the New York Stock Exchange, Friday, March 21, 2014. An early gain on the stock market was mostly gone Friday afternoon, weighed down by biotechnology companies. (AP Photo/Richard Drew) less 
1 / 1
Associated Press | Photo By Richard Drew
Fri, Mar 21, 2014 5:48 PM EDT