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About the application:

Efficient Portfolio is a special phone apk, which calculates the "efficient portfolio" of shares according to the theory of Nobel laureate Prof. Harry M. Markowitz and gives instructions, how to change a given portfolio to become efficient. The efficient portfolio is a portfolio that provides the greatest expected return for a given level of risk, or equivalently, the lowest risk for a given expected return, also called "optimal portfolio". The model works right under the assumptions of the original theory: - The investor is acting in a rational and risk-averse manner. - Entry- and target values are quantified by expected values and standard deviation. - Shares of the portfolio are arbitrarily divisible. - The model does not acc transaction costs. - The model relates to a one period consideration. - Changes in the fair values are normally distributed. The model is intended for long-term investors (5 - 10 years). Refreshments of the portfolio (buy/sell shares) could carried out not more than one time a year, because transaction costs becomes eventually too high. Gratis Data API: Alpha Vantage Inc., Boston, Mass., USA. Contains ticker data in USD from NYSE, NASDAQ and OTC.