 Intevac, Inc. NASDAQ:IVAC saw a significant increase in short interest in the month of June. As of June 30th, there was short interest totalling 90,300 shares, an increase of 81.0 from the June 15th total of 49,900 shares. Based on an average daily volume of 80,500 shares, the short-interest ratio is presently 1.1 days. Currently, ... 