The formation of the global economy demonstrates the undeniable importance of investments in the sustainable development of any economic system. This study aims to highlight the trends in changes in investment inflows into the economic development of different world countries and to identify their impact on economic growth. The authors reviewed the main developments of various international scholars on the effects of attracting investments in the economy and ensuring its sustainable development. Both general scientific and unique research methods were employed while conducting this research. The authors monitored the changes in investment inflows on the example of middle- and low-income countries, particularly the United States and Ukraine. A selective study of the impact of investment on key indicators of economic development – gross domestic product and labor productivity – was conducted. The correlation between the studied factors is determined. The authors have outlined the main factors affecting the economies of countries. It has been found that geopolitical tensions and the outbreak of active hostilities in many regions facilitate the formation of an unstable world order marked by polarized discourses, decreased trust, and insecurity of national economic systems. These factors reduce the volume of investments by non-residents of the country. The authors have formulated the key aspects related to the

impact of investments on stimulating economic growth in different world countries using the methods of analysis, synthesis, and generalization.