 Alpha Pro Tech, Ltd. NYSEAMERICAN:APT was the target of a significant growth in short interest in June. As of June 15th, there was short interest totalling 4,210,000 shares, a growth of 41.3 from the May 31st total of 2,980,000 shares. Based on an average daily volume of 4,130,000 shares, the short-interest ratio is currently 1.0 ... 