 Insteel Industries Inc NASDAQ:IIIN was the target of a significant growth in short interest in April. As of April 15th, there was short interest totalling 330,400 shares, a growth of 15.6 from the March 31st total of 285,700 shares. Based on an average daily volume of 116,700 shares, the days-to-cover ratio is currently 2.8 days. ... 