Vertex, Inc. (NASDAQ:VERX – Get Free Report) saw a significant increase in short interest in the month of May. As of May 15th, there was short interest totalling 3,500,000 shares, an increase of 20.7% from the April 30th total of 2,900,000 shares. Based on an average daily trading volume, of 798,700 shares, the days-to-cover ratio […]