Quote from optioncoach:
From my experience with OX and ToS and what I have heard from IB, an Iron Condor is recognized when the put and call spread have the same distances between the strikes and you sell the same number of contracts. When that occurs, they will count margin on only one side of the spread. OX will treat it as 2 different spreads and 2 margin requirements if the distances are not equal or the number of contracts are not equal.
Basically I believe the brokers program their platforms to recognize margin and make it simplified to recognize ICs but count every other combination of spreads on an individual basis. I am sure that if you were with a large investment house and had a large portoflio you could ask them to treat the margin for call and put spreads with uneven strikes or numbers of contracts as the larger margin side. I think basically it comes down to the fact that margin requirements are automatically counted by the brokerages on their systems and ICs are easy to recognize and eveyrthing else is just looked at as individual spreads.
Phil
I have spoken with the margin department at OX on several occasions and they insist that these seemingly illogical ways of treating margin with assymetrical IC's is an SEC requirement over which they have no discretion.
