Gary, my understanding from reading this board for 13 years is that BAD news has to be PR'ed or 8Ked within 4 days, but good news is at the discretion of the company.
The SEC rules say no such thing. There is no place where they note a difference between good and bad news in general.
It is easy to see what must be disclosed in 4 days. They are listed in the form 8-K. It says nothing about the BAD/GOOD difference.
But why believe SEC documents when you can believe social media pumpers?