Sold at $50.90I'm out because of this. Will buy back in a couple of weeks at $45.00 when the margins are payed.
Interactive Brokers bulletin board
To HKFE,HKMEX,NYMEX,NYSELIFFE traders:
Fri Aug 19 13:29:35 2011 EST
As a result of the volatile trading environment at the present
time, please be advised that Exchange margins and House margins are
likely to increase over the next couple of days. For exchange-
specific increases, please visit the respective websites. IB will
also be increasing the gold derivatives margin. Please monitor any
affected holdings closely and manage your risk accordingly.