Robert Morse
Sponsor
329200-There are comments here I feel are important to correct. Futures do not use Portfolio Margin, they use exchange SPAN margin which is much different. SPAN margin adapts to current risk while OCC PM does not change often and relies on house rules of the clearing member to adapt to current risk. As an example, ES future now requires $13,200 while not long ago that requirement was well under $9000. The % of notional value jumped from under 5% to over 9%. The OCC requirement for shocking equities is still 15% and SPX is still -8%/+6%. The requirements you speak of are house rules to manage risk by the clearing brokers. They can be more restrictive at the whim of the risk/credit department. SPAN margin for futures do not often change intraday as they are used for EOD calculations.
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