CNBC's Stock Pops & Drops From September 2

, Tim Seymour said that

spiked 5.35 percent on Tuesday on

from Stifel analyst, who increased the price target to $400. The analyst assumes no competition for the company and the advance of development and production. Tim Seymour thinks that

won't be able to reach necessary production levels. Dan Nathan explained that

gained 3.82 percent on the news that

. He thinks that this is not a bad speculative name to have in a portfolio, but he would place a $6 stop loss. Guy Adami said that

has not performed well since the January and it dropped 1.04 percent on a downgrade by Buckingham Research Group. He added that the chart doesn't look good because it has a series of lower highs and lower lows and that $120 is a key support level. Karen Finerman likes

, which fell 3.28 percent on Tuesday. She said that there were no relevant news on Tuesday and that the stock traded lower because it was overdone on the upside in the August.