The cause of the housing bubble and financial crisis

Nobel Laureate Paul Krugman gives his thoughts on what caused the housing bubble and resulting financial crisis:

How did this global debt crisis happen? Why is it so widespread? The answer, I’d suggest, can be found in a speech Ben Bernanke, the Federal Reserve chairman, gave four years ago. At the time, Mr. Bernanke was trying to be reassuring. But what he said then nonetheless foreshadowed the bust to come.

The speech, titled "The Global Saving Glut and the U.S. Current Account Deficit," offered a novel explanation for the rapid rise of the U.S. trade deficit in the early 21st century. The causes, argued Mr. Bernanke, lay not in America but in Asia.

In the mid-1990s, he pointed out, the emerging economies of Asia had been major importers of capital, borrowing abroad to finance their development. But after the Asian financial crisis of 1997-98 (which seemed like a big deal at the time but looks trivial compared with what’s happening now), these countries began protecting themselves by amassing huge war chests of foreign assets, in effect exporting capital to the rest of the world.

The result was a world awash in cheap money, looking for somewhere to go.

Most of that money went to the United States — hence our giant trade deficit, because a trade deficit is the flip side of capital inflows. But as Mr. Bernanke correctly pointed out, money surged into other nations as well. In particular, a number of smaller European economies experienced capital inflows that, while much smaller in dollar terms than the flows into the United States, were much larger compared with the size of their economies. ...

For a while, the inrush of capital created the illusion of wealth in these countries, just as it did for American homeowners: asset prices were rising, currencies were strong, and everything looked fine. But bubbles always burst sooner or later, and yesterday’s miracle economies have become today’s basket cases, nations whose assets have evaporated but whose debts remain all too real. ...

If you want to know where the global crisis came from, then, think of it this way: we’re looking at the revenge of the glut.