I flew too close to the sun a few days ago, shorting a large quantity of an illiquid stock that was not readily located. This trade would have created a large dent in my account had it gone wrong. (https://www.elitetrader.com/et/threads/ib-close-out-advisory.335975/) I am now much more concerned by operational and execution risks. I am seriously exploring "partitioning" my account into a multitude of smaller sub-accounts, as a fail safe solution to operational errors of this kind (fat finger errors, api order transmission failures, etc...). IB offers centralised management for multiple-accounts. Is anyone experienced with such a structure? What are the possible drawbacks?