Acco Brands (ACCO) closed the last trading session at $5.04, gaining 1.4% 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 $10.83 indicates an 114.9% upside potential.The mean estimate comprises three short-term price targets with a standard deviation of $2.93. While the lowest estimate of $7.50 indicates a 48.8% increase from the current price level, the most optimistic analyst exp ...