Quote from stefan_777:
He's ignoring the fact brokers have specific initial and maintenance margins for spreads which take into account potential issues with assignment or wacky pricing, and that's all you have to meet, black swan or not. You're obligated to fulfill the margin requirements laid out before you, which are easy to see, and if you don't meet them initially, you can't trade in the first place. Blind as a bat and loves to drink the koolaid that IB can do no wrong. Who else could argue in favor of a profitable position in both spreads and currencies being liquidated in the middle of the day by legging out incorrectly with no assignment notice of course? Even after someone from IB came out and said it wasn't an options pricing issue. Go figure.
Stefan_777,
IB does not have specific margin requirements for option spreads in cash accounts, where the options are physically settled or American style. You are ignoring this fact. IB's requirements, for such put spreads, are the same as for short naked puts. Everybody on this thread, who expressed any opinion on this point, has already told you that you are wrong in this area.
IB does have specific margin requirements for such option spreads in margin accounts, but those margin rules do not ensure a customer will have sufficient margin to be able to avoid extreme losses due to assignment of a short leg. This danger requires knowledge and care by the customer, which it seems many or most retail customers recklessly ignore.
You have, in this thread, falsely attributed many very unreasonable statements, which I never actually made.
I never suggested, for example, that IB can do no wrong. I said quite the opposite, that IB's documentation on margin rules is not sufficiently clear, and that for this reason, IB might be partly at fault for the OP's situation.
I never argued in favor of liquidating the OP's profitable options spread. I explained, instead, that such an unfortunate result can be caused by a customer's carelessness and can be required by margin rules; and that these margin rules are designed to address actual risks which do exist, though few people seem to understand those risks.
I don't think we have enough information to judge whether the OP was at fault, or if IB was at fault. The flow of details has been very limited, and has apparently halted entirely, so that we may have never have enough information. We would need to know about anything which might have affected the account, from the time the put spreads were entered, until the time they were liqudated; but we don't have this information; and we still don't even know if it was a cash account!
These are only some examples of how you falsely attributed very unreasonable statements to me. I think this pattern of dishonesty, in combination with your other conduct throughout this thread, indicates that nothing you say should be taken seriously. I think that any attempts by you, to attribute statements to me, should be assumed false and should be ignored by anyone reading.