Their stock price hasn't appeared to notice - so I'm guessing that investors (like the majority of us I'd assume) are cotinuing on with the theory that even out

Their stock price hasn't appeared to notice - so I'm guessing that investors (like the majority of us I'd assume) are cotinuing on with the theory that even outright identifying a company as a monopoly isn't going to result in any serious anti-trust legislation in this modern world. Obviously Facebook itself is going to try and play it cool throughout this entire proceeding - but the investors will usually jump ship if they're concerned.