 Enservco Corp NYSEAMERICAN:ENSV was the recipient of a significant increase in short interest in the month of June. As of June 15th, there was short interest totalling 3,950,000 shares, an increase of 10.6 from the May 31st total of 3,570,000 shares. Currently, 8.5 of the companys stock are short sold. Based on an average daily ... 