OUMAIMA Abouzaid Department of Economics and Management, Chouaib Doukkali University, Eljadida, Morocco   PRG.OUM RABII, N 47 LOTISSEMENT ESSALAM EL JADIDA El jadida, 20000 Maroc   oum.abouzaid@gmail.com             JEL Areas: C1 : Econometric and Statistical Methods: General G1 : General Financial Markets: General (includes Measurement and Data)