List of Articles undesirable risk Open Access Article Abstract Page Full-Text 1 - Impact of portfolio diversification on the performance of holding companies based on modern and modernized theories of portfolios ali farhadian Open Access Article Abstract Page Full-Text 2 - Mean-Variance test based on theoretical framework of downside risk using VAR fereydoun Rahnamay Roodposhti mehdi Hemmati Asiabargi Laleh Shabani Barzegar Fatemeh Khaksarian