China Online Education Group (NYSE:COE – Get Rating ) saw a significant growth in short interest in the month of February. As of February 15th, there was short interest totalling 576,900 shares, a growth of 228.0% from the January 31st total of 175,900 shares. Based on an average trading volume of 442,300 shares, the short-interest ratio is presently 1.3 days. Large investors have recently added to or reduced their stakes in the business. Prescott Group Capital Management L.L.C. acquired a new position in China Online Education Group during the third quarter worth $26,000. Two Sigma Securities LLC acquired a new...