Managing portfolio on the customers' order is a service which involves investing a customers' means on their behalf and on their account in selected instruments of the financial market. The assets in question may include cash, securities and other financial instruments. The first step in the process is constructing assumptions of the investment strategy by the investor. The assumptions specify kinds of risks the investor is prepared to take and investment targets and aims. The second step in the process of the portfolio management is updating current and future conditions (financial, economic, political) by the investor. The third step is creating the portfolio itself. Considering the assumptions of investment strategy and financial market forecasts the investor specifies what securities to choose, how to carry out their allocation and on what markets. The management process aims at constructing the portfolio which would generate the highest possible rate of return at a minimum risk. The fourth step in the process is constant monitoring of the investor's needs and conditions of financial market. The element of the monitoring process is evaluation of the portfolio's profitability and comparison of results with the expectations included in the investment strategy assumptions. Professional management of the portfolio provides the investor wilh benefits resulting from specialization and knowledge of the managing firm and enables him to take advantage of dynamic development of the financial market.