Groupon, Inc. (NASDAQ:GRPN – Get Free Report) was the target of a significant decrease in short interest in December. As of December 31st, there was short interest totalling 4,260,000 shares, a decrease of 7.4% from the December 15th total of 4,600,000 shares. Based on an average daily trading volume, of 1,290,000 shares, the days-to-cover ratio […]