Have you been paying attention to shares of Rigel Pharmaceuticals (RIGL) ? Shares have been on the move with the stock up 73.3% over the past month. The stock hit a new 52-week high of $51.73 in the previous session. Rigel has gained 203% since the start of the year compared to the 8.8% gain for the Zacks Medical sector and the 9.4% return for the Zacks Medical - Drugs industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, having beaten the Zacks Consensus Es ...