That's if you use insider information. That's only one kind of signal that Facebook has access to. There are signals that aren't based on insider information th

That's if you use insider information. That's only one kind of signal that Facebook has access to. There are signals that aren't based on insider information that FB could legally trade on. Information that other people don't have access to isn't by definition insider information. It's just stuff others can't or haven't figured out.