Groupon (GRPN +15.3%) investors definitely have something to be thankful for today; shares are...

|By:, SA News Editor

Groupon (GRPN +15.3%) investors definitely have something to be thankful for today; shares are now up 25% since Tiger Global disclosed it owns 9.9% of the daily deals/e-commerce firm. Groupon, of course, has seen plenty of big short-covering rallies since it went public last year, but they haven't thus far changed the post-IPO trend.