Axcelis Technologies Inc (NASDAQ:ACLS) was the recipient of a large growth in short interest during the month of May. As of May 15th, there was short interest totalling 1,080,000 shares, a growth of 6.9% from the April 30th total of 1,010,000 shares. Based on an average daily volume of 357,400 shares, the days-to-cover ratio is […]