PetroTal Corp. (OTCMKTS:PTALF – Get Free Report) was the recipient of a large growth in short interest in the month of December. As of December 15th, there was short interest totalling 6,645,900 shares, a growth of 37.1% from the November 30th total of 4,849,000 shares. Based on an average daily volume of 281,800 shares, the […]