 Exterran Corp NYSE:EXTN was the target of a significant increase in short interest in March. As of March 13th, there was short interest totalling 1,503,800 shares, an increase of 31.9 from the February 27th total of 1,140,000 shares. Based on an average daily trading volume, of 348,300 shares, the days-to-cover ratio is currently 4.3 days. ... 