Shares of Ambac Financial Group (AMBC) have gained 19.4% over the past four weeks to close the last trading session at $9.91, 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$14.67 indicates a potential upside of 48%.The mean estimate comprises three short-term price targets with a standard deviation of $4.51. While the lowest estimate of$10.00 indicates a 0.9% increase from th ...