CNBC's Stock Pops & Drops From May 12

, Tim Seymour explained that

spiked 5.12 percent on take over rumors. He believes that this is not a reason to buy the stock. He has a long position in the stock, but he is not adding to it. Pete Najarian said that he would not chase

after it jumped 4.06 percent on Tuesday on rumors that it could get bought. Steve Grasso is not a buyer of

, which fell 3.78 percent after it missed quarterly report deadline. He sees more downside in the name. Brian Kelly thinks that

is in a free fall and he doesn't want to buy it. The stock fell 5.20 percent on Tuesday.