Economics: Overvalued Wall Street

In the years leading up to the 2008 crisis, the financial industry accounted for a third of total domestic profits — about twice its share two decades earlier.

So why were bankers raking it in? My take, reflecting the efforts of financial economists to make sense of the catastrophe, is that it was mainly about gambling with other people’s money. The financial industry took big, risky bets with borrowed funds — bets that paid high returns until they went bad — but was able to borrow cheaply because investors didn’t understand how fragile the industry was. And what about the much-touted benefits of financial innovation? I’m with the economists Andrei Shleifer and Robert Vishny, who argue in a recent paper that a lot of that innovation was about creating the illusion of safety, providing investors with “false substitutes” for old-fashioned assets like bank deposits. Eventually the illusion failed — and the result was a disastrous financial crisis.

See Don't Cry for Wall Street by Paul Krugman, April 22, 2010.