I guess the CME is next. Plan A hike the margins, plan B attack the metals and then maybe if they can hit G&S.
from zerohedge.com
It's Baaaaaack: Interactive Brokers Just Hiked Silver Margins
Submitted by Tyler Durden on 08/03/2011 11:01 -0400
Volatility
Here we go again...
Aug 03, 2011 10:43 EDT
NOTIFICATION - Margin Increase on Silver Derivatives
In light of recent unprecedented volatility in silver markets, the exchanges that offer trading in silver derivative contracts are increasing the margin requirements on these products. In an effort to adequately address the inherent risk resulting from this volatility, IB is increasing margin requirements on silver derivative contracts to a level exceeding that which the exchanges are implementing.
Please monitor and manage your risk accordingly.
Interactive Brokers Customer Service