Quote from Lobster:
I have had a few margin calls with IB, and yes, it usually works out so that you lose money, and if only you had been allowed to stay in the position, you would have been able to later get out at a lesser loss. That's what margin calls are all about. It's not IB's fault. On the contrary, I'm sure one of the reasons IB can offer low commissions is the efficiency with which they execute forced liquidations / manage their risks. In a way, they maximize their profit this way.
That said, whenever I had a forced liquidation in my IB account, IB did almost exactly the minimum amount necessary to satisfy their margin requirement while trying to keep my portfolio undisturbed, in other words, while their first priority is controlling their own risk by enforcing their margin requirements, a close second is to minimize impact on the client's account.
The latest example: MLK day: I bought 2 ES, and it ended up dropping to the point of a margin call. IB sold just 1 of my contracts (close to the bottom, of course), and I ended up pretty much breaking even on the entire trade when ES shot up that day or the next (I don't remember exactly, I was not actively trading over the holiday.)
If the market had moved farther down, IB would have liquidated my 2nd contract, and I would have lost more than if they had sold both right away. The way it played out, I came out ahead because of the way they handled it.
Either way, it seems obvious to me that IB did the right thing by me. It's not their job to speculate on my behalf. It is their job to let me carry out my own speculation within their risk parameters, and that's exactly what they have always done for me.