Have you been paying attention to shares of Exelixis (EXEL) ? Shares have been on the move with the stock up 2.3% over the past month. The stock hit a new 52-week high of $49.62 in the previous session. Exelixis has gained 30.2% since the start of the year compared to the -5.1% move for the Zacks Medical sector and the -4.2% return for the Zacks Medical - Biomedical and Genetics industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, having beaten the Zacks Co ...