@article{ author = {Mohammadnejadaghdam, Ali, Fazlzadeh, Alireza, Ahmadian, Vahid, Naghdi, Sajad}, title = {Improving the performance of Fama - French models in predicting expected returns by offering new definitions of risk factors in the Tehran stock exchange}, journal = {Advances in Finance and Investment}, year = {2022}, volume = {3}, issue = {9}, pages = {29-52}, doi = {10.30495/afi.2023.1972376.1171}, url = {https://sanad.iau.ir/fa/Article/1088532} }