Cognex Co. (NASDAQ:CGNX – Get Rating) was the recipient of a significant growth in short interest in the month of May. As of May 15th, there was short interest totalling 3,740,000 shares, a growth of 57.8% from the April 30th total of 2,370,000 shares. Approximately 2.2% of the shares of the company are short sold. […]