The article is devoted to the comparative picture and problems of foreign portfolio investment in the real sector of the economy. The article analyzes the main obstacles that arise in the process of attracting foreign portfolio investments. The factors influencing the increase in the flow of foreign portfolio investments, the possibility of their rapid attraction and effective distribution are considered. Sustainable development of the economy of any country today is impossible without active participation in world economic relations. Along with international trade, international flows of investment capital, carried out on the basis of effective cooperation between countries, are becoming increasingly important. In recent years, the issue of attracting external capital to the Armenian economy has become topical. Foreign investment is one of the most important conditions for stabilization and growth of the country's economy. This is primarily due to the fact that firms’ own financial resources are limited, which is due to a number of reasons in Armenian reality, such as high return on invested capital, high taxes, etc. The movement of global financial capital through the channels of the global financial system occurs in various forms, among which international portfolio investments, including investments in equity and debt securities, occupy a special place. Financial globalization is accelerating the trend towards expanding the market segment of international portfolio investments.