Quote from maxpi:
Is there a link to the announcement? I did not get an email from IB.
Here is the notice:
IMPORTANT MARGIN NOTICE
Effective Monday 6 August, and until further notice, there will be a significant change in the intraday margins for most stock and index futures. Specifically, the intraday margin will be set to cover a price move of 4% in the instrument, but will not exceed the regular maintenance margin. By example, a 4% move in the ES futures would require intraday margin of 4% * 1450 price * 50 multiplier = 2900 USD. The regular intraday margin is 1400 USD and the regular overnight maintenance margin is 2800 USD so for ES the intraday margin would be the same as the overnight. PLEASE NOTE THAT THE ONLY MARGINS AFFECTED BY THIS POLICY CHANGE ARE INTRADAY (REDUCED) MARGINS ON EQUITY-LINKED FUTURES AND FUTURES OPTIONS.
Please note that the statutory margin requirements for many US index futures and options imply a very small intraday margin requirement (in the case of ES, less than 2%). In light of the recent volatility in the markets, we feel it is prudent to apply margins that are consistent with this increased volatility.
Interactive Brokers Risk Management
Jack