CytomX Therapeutics, Inc. (NASDAQ:CTMX – Get Free Report) was the target of a large increase in short interest during the month of May. As of May 15th, there was short interest totalling 8,750,000 shares, an increase of 143.1% from the April 30th total of 3,600,000 shares. Based on an average trading volume of 6,480,000 shares, […]