There is a VAST difference between good advice and good news.
When the company you’ve invested in goes bankrupt and their share price starts falling, it is good advice to sell your shares as soon as possible. When your mechanic phones you and says your car is starting to give up its ghost and things are starting to go horribly wrong, its good advice to sell your car. When the school phones you to say that your teenage son has been bunking again and been caught smoking at the local mall, its good advice for your son to mentally prepare himself for a good dose of discipline. Good advice, you see, is often the result of bad news.