Well, that didn't take long.
After just 13 days of be being publicly traded, Groupon dropped below its $20 IPO price this morning.
Non-investors shouldn't take this as a sign that Groupon itself is a failure. The IPO was simply overpriced. Groupon continues to grow at a heady clip. However, more and more people are questioning the profitability of the model. We'll see if Groupon bounces back.