1. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China; 2. Faculty of Economics and Business, University of Groningen, Groningen 9700 AB, Netherlands; 3. School of Economics and Management, University of Chinese Academy of Sciences, Beijing 100190, China; 4. Key Laboratory of Big DataMining and Knowledge Management, Chinese Academy of Sciences, Beijing 100190, China
For studying the relation between equity's expected return and conditional variance, this article uses SSE-Index daily return and GARCH-MIDAS model to estimate investors' risk-preference. Theoretical model clarifies that their time-series relation is determined by investors' risk-preference when the weight of investors' risky asset is constant. When assuming risk-preference is constant, GARCH-MIDAS shows that investors are risk-neutral. Subsequently, we identify bear/bull market by Markov regime switch model, and study investors' risk-preferences under the two regimes respectively. Results reveal that investors are risk-averse during bear market but risk-seeking during bull market.
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