man all these attacks on ib are jeolousy. ib is insured if they go under who cares we all get are money just like if sch went under. ib is a huge company now and well capitalized
funds get swept to the equity side each night so that number is not representative of customer assets. the financials for the brokerage unit are on IB's site.
All IB is doing here is staying compliant with SRO and Margin rules. I would be worried if they did not do this.
I may be a critic of IB on 2 issues but this is an example of one of the many things that IB gets VERY RIGHT.