I'd be willing to accept it's just the press with their doomsday headlines that make it seem as if there was a delusion. But why does it drop 5% in a day then? Why are analysts always so surprised when actual reports come out?
It always takes me by surprise. For example when Amazon finally split their revenue to show how much their cloud offerings were making the stock jumped by 18%. How is that even possible? They have a cap of 250B one confirmation of something any geek with a calculator could've estimated makes the company jump 50 billion dollars.
You can tell me TWTR was accurately 2 years ago, and it's accurately priced today, but I can't believe it was accurately priced friday.
(I'm long in AMZN and totally surprised by the windfall)