Markov Switching in GARCH Processes and Mean-Reverting Stock-Market Volatility
GARCH过程中的马尔可夫转换与股市波动率均值回归
This article introduces four models of conditional heteroscedasticity that contain Markov-switching parameters to examine their multiperiod stock-market volatility forecasts as predictions of options-implied volatilities. The volatility model that best predicts the behavior of the options-implied volatilities allows the Student-t degrees-of-freedom parameter to switch such that the conditional variance and kurtosis are subject to discrete shifts. The half-life of the most…