Shares of MannKind (MNKD) have been strong performers lately, with the stock up 22.7% over the past month. The stock hit a new 52-week high of $5.93 in the previous session. MannKind has gained 60.2% since the start of the year compared to the 7% move for the Zacks Medical sector and the -0.8% return for the Zacks Medical - Biomedical and Genetics industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, as it hasn't missed our earnings consensus estimate in an ...