CNBC's Stock Pops & Drops From November 13

, Dan Nathan said that he wouldn't chase

after the stock spiked 7.27 percent on Thursday. He thinks that this could be a short squeeze, because it has a high short interest. Guy Adami commented on a 2.84 percent decline in

on a large volume. He thinks that the trading action on Thursday was a lot of noise. Brian Kelly explained that

traded 2.32 percent higher on a positive mention by Goldman Sachs. He would take profits in the name. Pete Najarian believes that a pull back of 2.53 percent in

on Thursday is a great opportunity to buy. He added that the stock traded lower on the pricing of its hepatitis C drug and on the news on insider selling.