Zion Oil & Gas, Inc. (OTCMKTS:ZNOG – Get Rating) was the recipient of a large increase in short interest in the month of March. As of March 15th, there was short interest totalling 270,700 shares, an increase of 34.4% from the February 28th total of 201,400 shares. Based on an average trading volume of 1,363,900 […]