Last year, daily-deal provider Groupon was one of the hottest names in the tech sphere. As it came public, investors cheered and bought heavily in initial trading. Fast-forward to this year, and the scene has turned 180 degrees for Groupon. Once valued at more than $13 billion, it has seen its shares steadily punished by the market, including after another disappointing quarterly earnings announcement. The market now says Groupon is worth nearly $4 billion -- quite the haircut indeed. Is this justified? Were its most recent numbers that bad? Watch the following video to find out.

Much like the daily-deal industry and even Groupon itself, the mobile industry is in many ways still in its infancy. Because of its relative newness, picking the right play in this nascent space is just as challenging as it is in the social-media space. Fortunately, The Motley Fool has just released a free report on the mobile market named "The Next Trillion-Dollar Revolution." Inside the report, we not only describe why this seismic shift will dwarf any other technology revolution seen before it, but we also name the company at the forefront of the trend. Hundreds of thousands have requested access to previous reports, and you can access this new report today by clicking here -- it's free.