Shares of Tsakos Energy (TEN) have gained 12.5% over the past four weeks to close the last trading session at $20.11, 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$31 indicates a potential upside of 54.2%.The mean estimate comprises three short-term price targets with a standard deviation of $9.54. While the lowest estimate of$21.00 indicates a 4.4% increase from the current ...