Shares of American Superconductor (AMSC) have gained 7.3% over the past four weeks to close the last trading session at $23.48, 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 $30.33 indicates a potential upside of 29.2%.The mean estimate comprises three short-term price targets with a standard deviation of $2.31. While the lowest estimate of $29 indicates a 23.5% increase from ...