American Superconductor (AMSC) closed the last trading session at $18.73, gaining 0.1% over the past four weeks, but there could be plenty of upside left in the stock if short-term price targets set by Wall Street analysts are any guide. The mean price target of $27 indicates a 44.2% upside potential.The mean estimate comprises three short-term price targets with a standard deviation of $3.46. While the lowest estimate of $23 indicates a 22.8% increase from the current price level, the most optimistic analy ...