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- W3022934732 abstract "We extend the heterogeneous autoregressive- (HAR-) type models by explicitly considering the time variation of coefficients in a Bayesian framework and comprehensively comparing the performances of these time-varying coefficient models and constant coefficient models in forecasting the volatility of the Shanghai Stock Exchange Composite Index (SSEC). The empirical results suggest that time-varying coefficient models do generate more accurate out-of-sample forecasts than the corresponding constant coefficient models. By capturing and studying the time series of time-varying coefficients of the predictors, we find that the coefficients (predictive ability) of heterogeneous volatilities are negatively correlated and the leverage effect is not significant or inverse during certain periods. Portfolio exercises also demonstrate the superiority of time-varying coefficient models." @default.
- W3022934732 created "2020-05-13" @default.
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- W3022934732 date "2020-05-01" @default.
- W3022934732 modified "2023-10-03" @default.
- W3022934732 title "Forecasting Volatility with Time-Varying Coefficient Regressions" @default.
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- W3022934732 doi "https://doi.org/10.1155/2020/3151473" @default.
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