Shares of American Superconductor (AMSC) have been strong performers lately, with the stock up 55.4% over the past month. The stock hit a new 52-week high of $21.19 in the previous session. American Superconductor has gained 88.8% since the start of the year compared to the 16.9% move for the Zacks Computer and Technology sector and the 4.7% return for the Zacks Electronics - Miscellaneous Components industry.What's Driving the Outperformance?The stock has a great record of positive earnings surprises, as ...