Alessandro Sansone (Department of Economic Sciences; University of Rome “La Sapienza” & School of Finance & Economics; University of Technology, Sydney) Giuseppe Garofalo (Department of Managerial, Technological & Quantitative Studies; University of Viterbo “Tuscia” & Department of Public Economics; University of Rome “La Sapienza”)
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In this paper we present a continuous time dynamical model of heterogeneous agents interacting in a financial market where transactions are cleared by a market maker. The market is composed of fundamentalist, trend following and contrarian agents who process information from the market with different time delays. Each class of investors is characterized by path dependent risk aversion. We also allow for the possibility of evolutionary switching between trend following and contrarian strategies. We find that the system shows periodic, quasi-periodic and chaotic dynamics as well as synchronization between technical traders. Furthermore, the model is able to generate time series of returns that exhibit statistical properties similar to those of the S&P500 index, which is characterized by excess kurtosis, volatility clustering and long memory.
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Paper provided by EconWPA in its series Finance with number
0510026.
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