YOU WERE WARNED: Groupon Could be the Worst Public Investment EVER | Wall St. Cheat Sheet

At the beginning of last June, I warned prospective investors that Groupon (NASDAQ:GRPN) had many more red flags than traditional upside. I even went so far as to say buying the Groupon IPO could be one of the worst public investments ever. Well, turns out SEC inquiries, insiders dumping stock pre-IPO, and ZERO barriers to entry are great forecasters of horrible stock performance post-hype.