When the crash happened there were obviously a lot of "margin calls".     I am sure the market determined it a "fast" market which means fills where all over the place because of the panic.    I have a small account at IB that used to be very large until I transfered most of the money out.   I like there fills but here is what I don't like.      When the market crashed,    I  was  putting in basically  "bogus"  offers in for credits spreads.    What do you mean by "bogus".   Well..   asking    13.65 credit for a  10.00 point credit spread .     Or   6.50 credit on a five point spread.    It isn't so funny if you are the one being liquidated on a margin call for more than the spread amount.     I was lucky and got filled for numbers that you can't lose because the credit was more than the spread.     Anyway,  the point is ,  that is why I now have a small account at IB instead of a large account.    I don't wan't to take the chance that they pull that stunt on me.   

http://www.interactivebrokers.com/en/general/about/mediaRelations/08-17-12.php?ib_entity=ir

In case anyone doesn't know what the big re-hypothecation means.

http://en.wikipedia.org/wiki/Hypothecation

Openning a hedge fund! Love this country!!