From Martin Wolf of the Financial Times of London:
"Deregulation generates growth of credit, the raw stuff the financial sector creates and on which it feeds. Transmutation of credit into income is why the profitability of the financial system can be illusory. Equally, the expansion of the financial sector will reverse, at least within the US: credit growth and leverage masked low or even non-existent profitability of much activity, which will disappear, and part of the debt must also be liquidated. The golden age of Wall Street is over: the return of regulation is cause and consequence of this shift."