“…The seminal works of Andersen and Bollerslev (1998) and Andersen, Bollerslev, Diebold, and Ebens (2001) propose the realized volatility or realized variance (RV), which are defined as the sum of all available intraday high-frequency squared returns. Thus this model has garnered wide focus in academia (see, e.g., Andersen, Bollerslev, & Diebold, 2007;Bekaert & Hoerova, 2014;Bollerslev, Patton, & Quaedvlieg, 2015;Busch, Christensen, & Nielsen, 2011;Corsi, Pirino, & Reno, 2010;Duong & Swanson, 2015;Wang, Ma, Wei, & Wu, 2016;Wang, Pan, & Wu, 2017). Corsi (2009) propose a simple heterogeneous autoregressive model of realized volatility (HAR-RV) based on the heterogeneous market hypothesis, which can capture "stylized facts" in financial market volatility, such as long memory and multiscaling behavior, and have other advantages in forecasting.…”