I haven't had a high regard for Volcker so I was surprised to find he proposes a system that I believe is necessary. In short it is have commercial banks which are commercial banks and have investment banks which are investment banks (eg players in markets - capital, stock and derivative markets). Investment banks cannot be commercial banks and vice versa.

My precis went over your head; you will need, first, to read and understand Volckers speech putting his proposal, http://www.ritholtz.com/blog/2009/02/paul-volcker/Quote from ByLoSellHi:
You're joking, right?
