Comment Re:It wasn't the tweet (Score 5, Informative) 185
The idea that releasing the Q1 earnings after-hours allows people to make better judgments - they don't think "shit I have to sell all my stock RIGHT NOW", because they have a bit to think about it before the morning. Otherwise, you get a runaway effect, with some people selling early, people noticing the stock price dropping, and it starts crashing as more and more people try to sell before it "craters."
In theory, more time to react will smooth out your responses and make things less scary.