标题：ANALYSIS OF THE OPTIMAL PORTFOLIO FORMATION OF THREE COMPANIES USING PORTFOLIO THEORY (CASE STUDY ON STOCK AT PT.GUDANG GARAM TBK, STOCK AT PT.HM SAMPOERNA TBK, AND STOCK AT PT.TIMAH TBK)
摘要：Keyword: Keyword : portfolio analysis, optimal portfolioAbstrack:ABSTRACT :The purpose of this research is to investigate the formation of an optimal portfolio of issuers of stock of PT.Gudang Garam Tbk, PT.HM Sampoerna Tbk, and PT.Timah Tbk. The objective of the optimal portfolio is to obtain maximum benefit level with a certain risk, or with minimal risk of trying to get certain advantages level. While the purpose of investor stock investing is to generate maximum profits. Every advantage is inseparable from risk to reach it. Therefore, investors need to perform portfolio optimization to minimize the risk, so the results are expected in each type of securities can be close to each other The method used is the method of Markowitz. Data used in this research is quantitative secondary data in the form of company stock price of PT.Gudang Garam Tbk, PT.HM Sampoerna Tbk, and PT.Timah Tbk during the period March 2009 - April 2009. Data taken from the Indonesia Stock Exchange. The data obtained were processed using an analysis tool that includes counting actual return, expected return, variance and standard deviation of investment, the correlation coefficient, portfolio return, variance and standard deviation and coefficient of variance portfolio. The results of the calculation used to find the optimal portfolio. The results of this study concluded that: Optimal Portfolio of all stocks as a combination of the above, the optimal portfolio of all combinations of these shares is the portfolio with a combination of 2 shares of the portfolio with a combination stock of PT.HM Sampoerna Tbk, and PT.Timah Tbk, the proportion of funds respectively 15% and 85% yield Expected Return of 0.0070 and standard deviation of 0.
