Physicists Predict Shanghai Exchange Plunge

A stock model developed by physicists has apparently made a successful prediction of a fall in the Shanghai Stock Exchange. The model was developed by Didier Sornette of the Financial Crisis Observatory in Zurich, Switzerland, and Wei-Xing Zhou of the East China University of Science and Technology in Shanghai. It is taken from concepts about the physics of complex atomic systems.

The idea is that if a plot of the logarithm of the market's value over time deviates upwards from a straight line, it's a clear warning that people are investing simply because the market is rising rather than paying heed to the intrinsic worth of companies. By projecting the trend, the team can predict when growth will become unsustainable and the market will crash.

Sornette, Zhou and colleagues applied their model to the Shanghai Composite Index, which tracks the combined worth of all companies listed on the Shanghai Stock Exchange, the world's second largest. Early this year, the index gained 50 per cent in just four months. In July, the team predicted that the index would start to fall sharply by 10 August (www.arxiv.org/abs/0907.1827). The index duly began to slide on 4 August, falling almost 20 per cent in the subsequent two weeks.

Star Trek fans may recall that the Ferengi have invested a lot in the exploration of the science of capitalism. Even religious interests are subsumed in the pursuit of profit.


(The Ferengi don't think you have the lobes for that)

From New Scientist; thanks to Moira for suggesting this story and providing references.

Scroll down for more stories in the same category. (Story submitted 9/17/2009)

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