Ameren Co. (NYSE:AEE – Get Free Report) saw a large growth in short interest in the month of January. As of January 31st, there was short interest totalling 3,410,000 shares, a growth of 14.0% from the January 15th total of 2,990,000 shares. Based on an average trading volume of 2,100,000 shares, the days-to-cover ratio is […]