Other than good/bad news what cause share price to change

I watch certain shares and see prices go up and down. Some small but some big. Even on days there really isn't any news or big announcements for the company the stocks will just pop up. What exactly is causing things like this to happen?

Submitted March 06, 2018 at 02:35PM by WintersDawn184 http://ift.tt/2tljSWm