تفاصيل الرسالة العلمية

This study aims at examining the possibility of benefiting from diversification policy as a means to minimize risks in order to reach the number of stocks which may provide on ideal diversified portfolio. This means to know the size of the portfolio which is characterized by holding a positive number of diversified stock, with least risks or higher returns. Markowitez model has been utilized, and order to achieve the study's objectives simulation approach and regression analysis and correlation coefficient were used along with stock returns represented in weekly closing prices for companies listed in Amman Exchange market during the period 2/12/2005 to 13/3/2010 for (100) companies listed in Amman Exchange. Results showed, through the use of Markowitez model, that when the number of stock increases in the portfolio, risks of portfolio decrease Diversification benefits can be obtained when the portfolio consists of 15-16 stocks. Results revealed that diversification benefits increases with a decreased rate. And the study recommended the need to take the investor policy of diversification in their portfolio