Bird i have heard that also, but when I called my broker and switched from margin to cash account, I thought I called his mom a name,,,I couldnt believe the stink this guy put up and he threaten me that if I didnt take care of $1.44 I owed them he was going to sell some of my stock to take care of $1.44,,,,,,,Thats right,,,,,,The way he acted I would have to say they can't short my stock in a cash account......JMHO