It's just that economies are systems with feedback loops that exist on islands of stability. Like a ball on top of a hill.
Its the same thing for your car; any news is bad news, because your car operating as normal is not news, and anything that happens will move your car away from that optimal spot - it's bad news.
Its the same thing for your car; any news is bad news, because your car operating as normal is not news, and anything that happens will move your car away from that optimal spot - it's bad news.