abbey1212 Tuesday, 07/21/15 11:12:03 AM Re: None Post # of 22 Catalyst behind Thoratec spike higher unclear The catalyst behind the spike higher in shares of Thoratec (THOR) is unclear to traders and investors. The medical device maker focused on advanced heart failure patients rose as high $62.05 in early trading and its shares remain up 11%, or $5.48, to $54.29. Some vague takeover chatter surfaced, with St. Jude Medical (STJ) as the speculated buyer, but buyout rumors are often the "go-to" reason when stocks spike. Often the moves on rumors are less substantial than Thoratec's spike today. The company's close competitor HeartWare (HTWR) is not seeing any unusual trading thus far today, falling 36c to $78.81 in early trading.