فهرس المقالات Mahbobeh Eibakabadi المقاله 1 - The Study of the Effect of Fraction Resulted of Bad News on Stock Returns Emphasizing the Regulatory Power of Information Disclosure Policies 10.22034/amfa.2017.531301 Mahbobeh Eibakabadi Advances in Mathematical Finance and Applications , العدد 2 , السنة 2 , بهار 2017