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An analysis of the effect of investor sentiment in a heterogeneous switching transition model for G7 stock markets

Fredj Jawadi (), Hela Namouri and Zied Ftiti

Journal of Economic Dynamics and Control, 2018, vol. 91, issue C, 469-484

Abstract: In line with Chiarella and He (2000) and Boswijk et al. (2007), this study examines the stock market dynamics in a behavioural heterogeneity framework. In particular, we analyse the stock return dynamics in G7 countries over recent decades while considering the effect of heterogeneous investor sentiment. We develop an empirical and nonlinear heterogeneous stock price specification allowing for the presence of two types of investors (arbitrageurs and noise traders) and two regimes. With reference to the heterogeneous smooth transition regression model, we enable the price to switch smoothly between regimes after accounting for an endogenous change in investor sentiment. Our findings do not reject the hypothesis of the nonlinear investor sentiment effect on stock returns. Further, we show that two regimes characterize the stock price dynamics for which the price is closely governed by fundamentals in the first one, while investor sentiment drives the price in the second one. Our model, therefore, captures the main stylized facts observed in the market and shows good in- and out-of-sample forecasting power.

Keywords: Stock return dynamics; Investor sentiment, Nonlinearity; Smooth Transition Regression, Forecasting (search for similar items in EconPapers)
JEL-codes: C20 G10 (search for similar items in EconPapers)
Date: 2018
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Journal of Economic Dynamics and Control is currently edited by J. Bullard, C. Chiarella, H. Dawid, C. H. Hommes, P. Klein and C. Otrok

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