Importance Investors have individual perception of and attitude to risk when making their decisions. The article offers a model to build a portfolio considering the indicator of its efficiency and investor's attitude to risk. The following measures of risk are taken into account: Value at Risk, semideviation, standard deviation. It is possible to apply the proposed models in practice. Objectives The aim is to offer a suitable model to an investor on the basis of portfolio performance and investor's attitude to risk. Methods The study rests on statistical and portfolio analysis, using optimization methods. Results I offer modifications of the Rubinstein's function, consisting of mathematical expectation and dispersion of return on assets, compare the offered functions with the Rubinstein's function on the basis of performance indicator of created portfolios, which takes into account expected return, value at risk, semideviation and standard deviation of the portfolio return. The findings may be useful for economists, analysts, investors wishing to build an optimal portfolio based on various measures of and attitude to risk. Conclusions and Relevance The paper suggests a suitable model for an investor and recommends the use a model, which is based on a modified function or a model with the Rubinstein's function, depending on risk aversion. Comparing the models, using the portfolio performance indicator, enables to make recommendations for the portfolio structure.
Keywords: optimal portfolio, standard deviation, semideviation, Value at Risk, VaR
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