Some desks / traders / brokers work on a very small time frame. Some pros won't be allowed overnight holds let alone weekend holds and some wont want risk on over weekends. Also Friday arvo and most traders & brokers I know go to pub at lunchtime and won't come back to the desk. My take is most bought in this morning expecting a quick bounce and that hasn't materialised so time to get out and enjoy the sunshine. Just my thoughts.