by Sam Vaknin

Created on: January 26, 2007   Last Updated: April 09, 2007

The recent implosion of the global equity markets - from Hong Kong to New York - engendered yet another round of the semipternal debate: should central banks contemplate abrupt adjustments in the prices of assets - such as stocks or real estate - as they do changes in the consumer price indices? Are asset bubbles indeed inflationary and their bursting deflationary?

Central bankers counter that it is hard to tell a bubble until it bursts and that market intervention bring about that which it is intended to prevent. There is insufficient historical data, they reprimand errant scholars who insist otherwise. This is disingenuous. Ponzi and pyramid schemes have been a fixture of Western civilization at least since the middle Renaissance.

Assets tend to accumulate in "asset stocks". Residences built in the 19th century still serve their purpose today. The quantity of new assets created at any given period is, inevitably, negligible compared to the stock of the same class of assets accumulated over decades and, sometimes, centuries. This is why the prices of assets are not anchored - they are only loosely connected to their production costs or even to their replacement value.

Asset bubbles are not the exclusive domain of stock exchanges and shares. "Real" assets include land and the property built on it, machinery, and other tangibles. "Financial" assets include anything that stores value and can serve as means of exchange - from cash to securities. Even tulip bulbs will do.

In 1634, in what later came o be known as "tulipmania", tulip bulbs were traded in a special marketplace in Amsterdam, the scene of a rabid speculative frenzy. Some rare black tulip bulbs changed hands for the price of a big mansion house. For four feverish years it seemed like the craze would last forever. But the bubble burst in 1637. In a matter of a few days, the price of tulip bulbs was slashed by 96%!

Uniquely, tulipmania was not an organized scam with an identifiable group of movers and shakers, which controlled and directed it. Nor has anyone made explicit promises to investors regarding guaranteed future profits. The hysteria was evenly distributed and fed on itself. Subsequent investment fiddles were different, though.

Modern dodges entangle a large number of victims. Their size and all-pervasiveness sometimes threaten the national economy and the very fabric of society and incur grave political and social costs.

There are two types of bubbles.

Asset bubbles of the first type are run or fanned

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