Wärtsilä Oyj Abp (OTCMKTS:WRTBY – Get Rating) saw a significant increase in short interest in the month of April. As of April 30th, there was short interest totalling 2,400 shares, an increase of 84.6% from the April 15th total of 1,300 shares. Based on an average daily trading volume, of 1,200 shares, the days-to-cover ratio […]