 Forestar Group Inc. NYSE:FOR was the target of a significant increase in short interest in May. As of May 29th, there was short interest totalling 510,500 shares, an increase of 5.4 from the May 14th total of 484,400 shares. Based on an average daily trading volume, of 153,500 shares, the days-to-cover ratio is presently 3.3 ... 