Market Mood, Adaptive Beliefs and Asset Price Dynamics

Roberto Dieci, Ilaria Foroni, Laura Gardini () and Xuezhong (Tony) He ()
Additional contact information
Roberto Dieci: Dipartimento di Matematica per le Scienze Economiche e Sociali, University of Bologna
Ilaria Foroni: Dipartimento di Metodi Quantitativi per le Scienze Economiche e Aziendali, University of Milano

No 162, Research Paper Series from Quantitative Finance Research Centre, University of Technology, Sydney

Abstract: Empirical evidence has suggested that, facing different trading strategies and complicated decision, the proportions of agents relying on particular strategies may stay at constant level or vary over time. This paper presents a simple "dynamic market fraction" model of two groups of traders, fundamentalists and trend followers, under a market maker scenario. Market mood and evolutionary adaption are characterized by fixed and adaptive switching fraction among two groups, respectively. Using local stability and bifurcation analysis, as well as numerical simulation, the role played by the key parameters in the market behaviour is examined. Particular attention is payed to the impact of the market fraction, determined by the fixed proportions of confident fundamentalists and trend followers, and by the proportion of adaptively rational agents, who adopt different strategies over time depending on realized profits.

Pages: 24 pages
Date: 2005-08-01
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Citations: View citations in EconPapers (28)

Published as: Dieci, R., Foroni, I., Gardini, L. and He, X., 2006, "Market Mood, Adaptive Beliefs and Asset Price Dynamics", Chaos, Solitons and Fractals, 29(3), 520-534.

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Journal Article: Market mood, adaptive beliefs and asset price dynamics (2006)
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