“…What's more, due to the simple structure and easy implementation, the generalized autoregressive conditional heteroscedasticity (GARCH) model proposed by Bollerslev (1986) becomes the most popular volatility model. As a consequence, many authors apply the GARCH model to predict EUA futures volatility, see, e.g., Byun and Cho (2013), Zeitlberger and Brauneis (2016), Wang et al (2019), Naik et al (2020), Huang et al (2021). Later, some scholars expand GARCH model and construct TGARCH, GJR-GARCH, ARMAX-GARCH, STR-GARCH models to predict the volatility of carbon futures price (Arouri et al, 2012;Byun and Cho, 2013;Rannou and Barneto, 2016;Sheng et al, 2021).…”