Facebook

As Friday's Facebook IPO -- and its gory aftermath -- proves, even experts can run into trouble investing in social media. But if you're still looking to get in on the Facebook action, and want to mitigate your risks, this ETF might be the way to go.

Facebook co-founder Eduardo Saverin gave up his U.S. citizenship and emigrated to Singapore immediately before Facebook's IPO. For him, it's not a bad tax move. But could it be right for you?

Facebook has ended its third trading day and the world is falling apart -- again. The stock closed Tuesday at $31, down 19% from the $38 IPO price, lead underwriter Morgan Stanley is under fire, the SEC is ready to investigate, and analysts are blaming everyone. Oh, and the fundamentals? Those haven't changed a bit.

Forget how Facebook is beating up its IPO investors: The social network is still giving many other publicly traded companies fits. And these five in particular are seeing their business models take a hit at Facebook's expense.

After all the finger pointing over Facebook's rapid share price decline, there is one factor that should have served as warning. Morgan Stanley, the lead underwriter, cut earnings estimates in the lead-up to the IPO -- while expanding its size and raising its price.

On Saturday, Mark Zuckerberg tied the knot with his college sweetheart, Priscilla Chan. Here's a gallery of their time together, as told through their Facebook timelines.

On Monday, Facebook's stock fell from its IPO price of $38 to a low of (as of this writing) $33.60. So what? Nobody who actually paid attention to Facebook's statements before the IPO should be surprised by this latest turn, or even worried. Here's why: