Graphic Packaging Holding (NYSE:GPK – Get Free Report) saw a significant increase in short interest during the month of June. As of June 30th, there was short interest totalling 17,130,000 shares, an increase of 41.5% from the June 15th total of 12,110,000 shares. Based on an average trading volume of 4,190,000 shares, the short-interest ratio […]