No, clearing corporation has nothing to do with segregation of funds. The function of clearing corporation is how they handle being the counterparty of transactions; it has nothing to do with segregation of funds. Segregation of funds has to do with how the money that you deposited with this broker is NOT commingled or mixed with the company's own money. So if you deposit your money with this broker, it's this broker who has to segregate or separate your money with its own money and take it as its own, NOT Interactive Brokers.