Celestica Inc. (NYSE:CLS – Get Free Report) (TSE:CLS) saw a significant increase in short interest in the month of May. As of May 15th, there was short interest totalling 4,910,000 shares, an increase of 31.6% from the April 30th total of 3,730,000 shares. Based on an average daily volume of 2,280,000 shares, the short-interest ratio […]