China Online Education Group (NYSE:COE – Get Rating ) saw a large increase in short interest during the month of February. As of February 15th, there was short interest totalling 576,900 shares, an increase of 228.0% from the January 31st total of 175,900 shares. Based on an average daily volume of 442,300 shares, the short-interest ratio is presently 1.3 days. Shares of China Online Education Group stock traded down $0.04 on Friday, reaching $1.23. 559 shares of the stock were exchanged, compared to its average volume of 512,105. China Online Education Group has a twelve month low of $0.76 and...