Check out this great piece on asset bubbles......

"All these crises are different. But many have shared common features. They begin with capital inflows from foreigners seduced by tales of an economic El Dorado. This generates low real interest rates and a widening current account deficit. Domestic borrowing and spending surge, particularly investment in property. Asset prices soar, borrowing increases and the capital inflow grows. Finally, the bubble bursts, capital floods out and the banking system, burdened with mountains of bad debt, implodes.

With variations, this story has been repeated time and again. It has been particularly common in emerging economies. But it is also familiar to those who have followed the US economy in the 2000s.

When bubbles burst, asset prices decline, net worth of non-financial borrowers shrinks and both illiquidity and insolvency emerge in the financial system. Credit growth slows, or even goes negative, and spending, particularly on investment, weakens. Most crisis-hit emerging economies experienced huge recessions and a tidal wave of insolvencies. Indonesia’s gross domestic product fell more than 13 per cent between 1997 and 1998. Sometimes the fiscal cost has been over 40 per cent of GDP (see chart).