Оценка на риска в мултиактивен портфейл от акции
Rsk Evaluation in Multiactive Portfolio of Shares

Summary/Abstract: One of the ways of decreasing the risk in the investments is diversification. This means the capitals not only to be spread in many investment holders but to be also properly chosen. Many examples (theoretical and practical) show that it is not always possible to create a portfolio with less risk than the risks of the consisting assets. The paper formulates and proves conditions for the connection between the correlation coefficients and the assets’ risks. When these conditions are present, it is not possible to create a portfolio between them with a risk, lower than the individual risks of its consisting assets. Given are also such conditions, which presence allows always creation of a portfolio with minimum risk. For demonstration of the application of the acquired results studied are the opportunities for creating proper portfolios of shares of 10 of the highest ranked companies at the Bulgarian Stock Exchange (BSE).

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