To me the real question is: what will come of these antitrust investigations into their targeted ad business?

That's the cash cow upon which their stock price is ultimately based. They've been able to get away with a lot of failures because ultimately advertising is such a huge business for them.

But if there's any move to break apart that business or regulate it in a way to create more competition in the market, to me that could be the thing that could start to undermine their share price.