Optimization of the Mean-Variance Model Investment Portfolio in Five Mining Stocks Traded on the IDX

The Mining and Energy sector is a major foreign exchange earner, provides the largest energy resource, as an absorber of labor. In addition, most resources used in Indonesian economy come from mining. namely oil coal. Investment for mining exploration Indonesia needs to be priority continue encouraged maintain level reserves raw materials future industrial development, including downstream. This study aims measure performance investment portfolios several stocks sectors. portfolio optimization method carried out using Mean-Variance model (Markowitz model). Based on results analysis, it obtained that combination proportion capital allocation formation has better performance, where optimum composition return 0.000866205 with variance 0.000261104. analysis can concluded ratio affect model.