BUILD AN EFFICIENT INVESTMENT PORTFOLIO USING THE WILLIAM RATIO (EMPIRICAL STUDY) IN IRAQ STOCK EXCHANGE: BUILD AN EFFICIENT INVESTMENT PORTFOLIO USING THE WILLIAM RATIO (EMPIRICAL STUDY) IN IRAQ STOCK EXCHANGE. IJMRCP [Internet]. 2020 Jun. 30 [cited 2024 May 3];12(1):1-13. Available from: https://jmracpc.uobaghdad.edu.iq/index.php/IJMRCP/article/view/184