[Marazan]

Thousands of Enron employees thought the same as you. They were ruined when their stock went to 0 overnight due to corporate malfeasance that was hidden from them

[eddd]

Enron didn't collapse overnight. And employees should the first ones who realised that something is going wrong in the company.

[Marazan]

Stock price closed at $4.11 27th of Novemeber.

Stock price closed at $0.60 28th of November.

I'm willing to say that wasn't the literal definition of overnight but it is close enough for a turn of phrase.