Thi hong van Hoang Montpellier Business School and Montpellier Research in Management, France   2300 avenue des Moulins Montpellier, 34185 France   thv.hoang@montpellier-bs.com   https://www.researchgate.net/profile/Thi_Hong_Van_Hoang           JEL Areas: G1 : General Financial Markets: General (includes Measurement and Data) Q4 : Energy: General