“…A plausible motivation for this interest is the need for accurately measure the volatility of energy futures prices. In fact, this variable plays a key role in the price connection between spot and futures markets—see, for example, Silvapulle and Moosa (1999), Lin and Tamvakis (2001), Hammoudeh et al (2003), Hammoudeh and Li (2004), Huang et al (2009), and Balcilar et al (2015)—on the linkage with economic and financial variables—as documented by Maréchal (2021), Prokopczuk et al (2021), Kupabado and Kaehler (2021), and Xu and Wang (2021)—and on risk management problems—see, for instance, Sadorsky (2006), Aloui and Mabrouk (2010), Yin et al (2021), and Ammann et al (2022). The time‐varying dynamics and contagion in commodity futures are explained in detail in Mehlitz and Auer (2021) and Gong, Jin et al (2022), respectively.…”