The sum of squared intraday returns provides an unbiased and almost error-free measure of ex-post volatility. In this … paper we develop a nonlinear Autoregressive Fractionally Integrated Moving Average (ARFIMA) model for realized volatility …, which accommodates level shifts, day-of-the-week effects, leverage effects and volatility level effects. Applying the model …

This study investigates the role of oil futures price information on forecasting the US stock market volatility using … futures realized volatility. In particular, the multivariate HAR model outperforms the univariate model. Accordingly …, considering the contemporaneous connection is useful to predict the US stock market volatility. Furthermore, these findings are …