Jenoptik AG (OTCMKTS:JNPKF – Get Rating) saw a significant increase in short interest in the month of May. As of May 31st, there was short interest totalling 2,400 shares, an increase of 242.9% from the May 15th total of 700 shares. Based on an average daily volume of 0 shares, the short-interest ratio is presently […]