China Online Education Group (NYSE:COE) saw a large decline in short interest during the month of October. As of October 15th, there was short interest totalling 380,300 shares, a decline of 22.4% from the September 30th total of 490,300 shares. Approximately 17.0% of the company’s shares are sold short. Based on an average trading volume of 800,400 shares, the short-interest ratio is presently 0.5 days. Several hedge funds have recently made changes to their positions in COE. BlackRock Inc. grew its holdings in shares of China Online Education Group by 53.2% in the 1st quarter. BlackRock Inc. now owns 69,608...