Quote from hanabi418:
hehe...at 2:52pm...when IB was flashing a margin warning message, my mind was in a blur... I don't really care its -20k or -200k bcos its impossible..and i can't do anything about it..there was just no price available for me to take off my verticals. Within 2 mins all my stocks were liquidated.
Quote from jimrockford:
This isn't true. If an option spread is American style exercise, and the short leg is assigned prior to expiry, and then the underlying subsequently moves against the long leg before it can also be exercised, then there can be a loss far greater than the premium paid + commissions.
So, the OP had currency positions? That explains part of it. But I still don't see how throwing away put verticals which is worth $500 a pop for next to nothing protects either the customer or IB.Quote from def:Given how this thread is full of innuendo I do want to point out the liquidations were not due to option pricing. Keep in mind the currencies were and are extremely volatile and if you hold a portfolio of currencies, those do get marked real time and if such movements put an account into deficit, the portfolio could be subject to liquidation.
Thursday was indeed a black swan event. While our system is far from perfect, the fact that there seem to be only a handful of cases that need to be dealt with, the system performed remarkably well given the volumes and extreme volatility. Of course we'll learn from this, adapt and make prudent adjustments. The liquidation system is designed to protect IB as well as client funds.