Obviously in the case of commodities there has to be a short for every long, so if you ban short sales there, you've effectively banned the futures market. Good luck with that.
How about housing? You can borrow money to buy a house, but you can't "borrow" a house to sell short. Why is that?
So many questions, so little time...
ebear
I have this strange ringing in my ears! Buzzing in my head!
I have to go look for the nearest rubber room.