 Harpoon Therapeutics Inc NASDAQ:HARP saw a large growth in short interest in July. As of July 15th, there was short interest totalling 522,900 shares, a growth of 17.2 from the June 30th total of 446,300 shares. Approximately 3.6 of the companys shares are sold short. Based on an average daily trading volume, of 183,800 shares, ... 