 Exterran Corp NYSE:EXTN saw a significant growth in short interest in April. As of April 15th, there was short interest totalling 1,330,000 shares, a growth of 17.7 from the March 31st total of 1,130,000 shares. Approximately 4.2 of the shares of the stock are short sold. Based on an average daily volume of 399,400 shares, ... 