Wednesday 30 December 2009

Stock market crash is triggered by drastic change in sentiment of market players

A stock market boom can be described as a bubble if there is high probability of a large scale fall in share prices.

 
Stock market crash is not triggered
  • by fundamental news or
  • by a certain level of share overvaluation.

Instead, it happens because of
  • a drastic change in the behavior of market players.

 
This is why the necessary and sufficient conditions for the bursting of a given asset price bubble, applicable in practice, cannot be provided with the tools of mathematical economics.

 
A market crash will ensue with a high likelihood if noise trading becomes dominant, the signals of which are to be found in the following stochastic factors:

 
• Increasing effect of leverage.

 
• Increasing activity on part of the economic policy.

 
• Increasing number of corporate scandals, fraud and corruption.

 
• Fundamentally unjustifiable co-movement of share prices.

 
http://myinvestingnotes.blogspot.com/2009/11/how-to-distinguish-stock-market-bubbles.html

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