Big tech stocks tumble

Facebook's down 20% and Twitter's down 14%, for reasons that everyone now says are obvious.

But the same pundit class was boosting them until reality bit:

One of the funny things about news aggregators, and filtered feeds in general (as opposed to chronological ones) is how they hide time and change and make everything seem immediate. Yesterday's confident bullshit gets posed against today's naked truth, competing with it until no-one's left who believes anything there.