Roku shares jump on Oppenheimer upgrade

Oppenheimer upgrades Roku to outperform from perform, forecasting 15 percent upside for shareholders over the next 12 to 18 months. Analyst Jason Helfstein writes that upside will come from the company’s ability to drive video advertising revenue, which could total as much as $19 billion given its expected market share. Roku ROKU stock is primed for a comeback as the online streaming platform starts to leverage its role as a leading over-the-top television provider, Oppenheimer says.