Shares of Exxon Mobil (XOM) fell 14 percent in 2015, but the oil giant has a lot of positive levers it can pull to turn things around in 2016, said Stewart Glickman, equity analyst at S&P Capital IQ. 'In an environment where there are going to be a lot of companies under some degree of duress, Exxon is probably one of the few that might be able to take advantage with some M&A activity,' said Glickman. He added that Exxon continues to buy back shares and raise its dividend, both increasingly rare financial moves in the troubled energy space. On the flip side, shares of Valero (VLO) surged over 49 percent last year and Glickman suggested that investors should stick with the refiner in the coming year, especially with gas prices remaining low in the United States.