Shares of American Superconductor (AMSC) have gained 24.3% over the past four weeks to close the last trading session at $29.23, but there could still be a solid upside left in the stock if short-term price targets of Wall Street analysts are any indication. Going by the price targets, the mean estimate of$39 indicates a potential upside of 33.4%.The mean estimate comprises three short-term price targets with a standard deviation of $1. While the lowest estimate of$38 indicates a 30% increase from the cur ...