Groupon’s stock closed in single digits today. After falling 3.3 percent (34 cents) they finished the day at $9.97 a share. This is the first time Groupon has ever closed out the day in single digits. Groupon, which is valued at $6.4 billion has been struggling since their 4th quarter results. If Groupon continues at $10 a share their stock will be trading 50 percent below the IPO price which was initially priced at $20 a share. [Source: All Things D]