China Online Education Group (NYSE:COE) saw a large drop in short interest in December. As of December 31st, there was short interest totalling 214,000 shares, a drop of 33.4% from the December 15th total of 321,500 shares. Approximately 9.6% of the shares of the company are short sold. Based on an average daily trading volume, of 340,600 shares, the days-to-cover ratio is currently 0.6 days. A number of institutional investors and hedge funds have recently added to or reduced their stakes in COE. Prescott Group Capital Management L.L.C. bought a new stake in shares of China Online Education Group during...