Evolutionary Stable Stock Markets
Zurich IEER Working Paper No. 170
25 Pages Posted: 4 Dec 2003
Date Written: October 27, 2003
Abstract
This paper shows that a stock market is evolutionary stable if and only if stocks are evaluated by expected relative dividends. Any other market can be invaded by portfolio rules that will gain market wealth and hence change the valuation. In the model the valuation of assets is given by the wealth average of the portfolio rules in the market. The wealth dynamics is modelled as a random dynamical system. Necessary and sufficient conditions are derived for the evolutionary stability of portfolio rules when (relative) dividend payoffs form a stationary Markov process. These local stability conditions lead to a unique evolutionary stable strategy according to which assets are evaluated by expected relative dividends.
Keywords: evolutionary finance, portfolio theory, incomplete markets
JEL Classification: G11, D52, D81
Suggested Citation: Suggested Citation
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