Glass-Steagall enforced bank diversity, we had investment banks on one side of the firewall and depository institutions on the other. When Glass-Steagall was repealed, the mega-banks started engaging in both types of banking. It's akin to a virus (the mega-banks) infecting the host (the financial system).
nice try but it was always illegal to fix funds between depository and investment bank so it had nothing to do with crisis.
Oy vey....
The largest banks owning and trading risky securities in the first place is what got them into trouble.
We've now seen a huge amount of activity move from banks to the capital markets. And due to a multitude of factors (network effects, high barriers to entry and deregulation which let these large institutions traverse products and global markets) we have capital markets run by a small number of institutions. And these institutions have become too-big-too-fail by the roles deregulation have enabled them to obtain, not just the magnitude of their size.
The financial sector has become so leveraged and concentrated that it's prone to failure. I do agree that simply separating investment and commercial banking is not enough. We have to do do something to stop the insane risk taking by the major players in the capital markets. Network effects in trading are incredibly powerful, and left alone to their own devices, the propensity is for more consolidation being the norm and not the exception. It would take much more government intervention via legislation (barriers between products, Tobin taxes, geographical barriers in markets, etc). It requires more than restructuring of the financial sector, the factors which create concentration need to removed from the equation.
The 800 pound gorilla in the room is derivatives. The big players have OTC derivatives exposure that borders on comical if it wasn't so serious and catastrophic. You need a MASSIVE balance sheet to to make OTC derivatives cost effective. The books are huge and most exposure is hedged in a nutty and pyramid like structure.
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