Explaining the role of central banks in the sub prime crisis

Ref The Economist dt Sep 11, 2008

According to George Cooper of JP Morgan, one of the main reasons for the global financial melt down is that central banks have subscribed to one economic philosophy in an expanding economy and quite another when the economy is contracting. When things are going well, central banks leave the markets alone. But at the merest hint of crisis, central bankers cut interest rates to stimulate their economies and prevent asset prices from falling. Indeed, this is what the Fed under Greenspan did. Greenspan argued that it was impossible to spot bubbles while they were inflating. Instead, he felt that central banks should quickly respond once the bubble had burst.

This school of thought believes that prices reflect all available information. On that basis, asset prices are always “right”, there can be no bubbles and central banks should not intervene to restrain speculative excess. Even if there is a temporary mispricing, the market will correct itself.

Cooper argues that markets are far from efficient. Investors may simply be unable to get enough information to make correct judgments about the value of securities, or indeed may be given misleading information by insiders such as company executives or salesmen from the financial-services industry.

During a market crash, central-bank intervention to prop up markets is often popular. There are few people who relish banking collapses or recessions. But it creates problems in the long run. The first is that consumers (and companies) are encouraged to borrow, not save, thanks to the low level of interest rates and a belief that central banks and governments will always rescue them if things go wrong.

The second danger is that the system becomes progressively less stable as risk-taking is encouraged. Instead, central banks should permit some short-term cyclicality in order to purge the system of excesses. They can do this by preventing excessive credit creation. This means that credit growth should not be far ahead of economic growth.

Letting the markets have their way would risk a repeat of the Great Depression. But the danger of bailouts is that central banks may inflate another credit bubble, saving the economy from disaster in the short term but raising the stakes still further when the next crisis comes around. The Bear Stearns, Fannie Mae, Freddie Mac and AIG rescues, suggests the world is heading in that direction.