Can someone please explain to me why so many are selling? I am...

Can someone please explain to me why so many are selling? I am relatively new to the sharemarket, however after doing the required reading that is at every beginner's finger, it doesn't make sense to sell at every little "scare" that comes from day to day.

I have read the posts from all of learned ones here, some long, some short, I have read and reread all the SGH announcements. It seems to me to make total sense to accumulate at these levels rather than sell and crystalize my current paper loss.