Activist investor Elliott Investment Management has reportedly built a sizable position in Starbucks — sending the coffee chain’s stock soaring late in Friday’s trading day.Elliott has reportedly been pushing Starbucks – which has faced criticism over long wait times – to find new ways to boost its stock price, according to the the Wall Street Journal, which first reported the Elliott’s stake. The Seattle-based coffee giant’s stock jumped nearly 7%, to $79.27, on the news. But the company’s shares are down ...