Aeterna Zentaris Inc. (NASDAQ:AEZS – Get Free Report) (TSE:AEZ) was the recipient of a large decrease in short interest in the month of April. As of April 15th, there was short interest totalling 16,900 shares, a decrease of 22.1% from the March 31st total of 21,700 shares. Based on an average daily volume of 15,900 […]