Wienerberger AG (OTCMKTS:WBRBY – Get Rating) was the target of a significant growth in short interest in the month of April. As of April 30th, there was short interest totalling 13,400 shares, a growth of 252.6% from the April 15th total of 3,800 shares. Based on an average daily trading volume, of 13,200 shares, the […]