Was waiting to see how long it would take for the cavalry to show up.
The time is question is clearly a volatile period or the option positions would not have been liquidated. IB clearly has to much exposure to the markets world wide and lean to heavily on algo to protect them. I have never seen a broker raise margin requirements as fast as IB. I can say they have the highest overnight futures margin.
No way that SPX puts premium would change >78 dollars within 19 seconds. Not on that day, perhaps during the flash crash. And no, quotes in index options during trading sessions are not 0.15/85 wide for sure.
seems crazy but the SPX did have an 8%+ range that day
If a majority of the move happened in 19 seconds then yes. thus not likely
Well it did not. Is it possible to stay on topic and to not make it personal again like in every thread?