 Magnachip Semiconductor Corp NYSE:MX was the target of a significant increase in short interest in July. As of July 15th, there was short interest totalling 619,200 shares, an increase of 5.5 from the June 30th total of 587,000 shares. Based on an average trading volume of 432,900 shares, the days-to-cover ratio is presently 1.4 days. ... 