Escobar, Marcos; Ferrando, Sebastian; Li, Fuyu; Xu, Ke - In: Econometrics : open access journal 13 (2025) 1, pp. 1-17
This paper revisits the topic of time-scale parameterizations of the Heston-Nandi GARCH (1,1) model to create a new, theoretically valid setting compatible with real financial data. We first estimate parameters using three US market indices and six frequencies to let data reveal the correct,...