It's odd for fb to drop this much without big news. Media is blaming weak earnings. Because that totally made people worry about fb stock before.
Now q implies qish reasons. That's odd too. Zuck/majorinvestors responding to unknown news is basically illegal. Zuck selling his own shares suddenly needs to be reported too. Sensible reasons to dump that much are generally required to be disclosed.
I'm not sure what q could even be implying. Liquidating seized shares?