Finance is wholly different from the rest the economy.
The very nature of finance is that it cannot be profitable unless it is significantly leveraged... and as long as there is debt, there can be failure and contagion.
Institutions of the newer participants in global finance had not been tested, until recently...recent crisis have underscored certain financial structure vulnerabilities that are not readily assuaged in the short run.
The determination of global economic activity in recent years has been influenced importantly by capital gains on various types of assets, and the liabilities that finance them. Our forecasts and hence policy are becoming increasingly driven by asset price changes.