Attracting foreign investment is becoming a key factor in ensuring stable economic growth of the state. Therefore, the study of the investment attractiveness of different countries and regions is becoming important, because it determines the choice of investors regarding the placement of capital. The purpose of this work is to identify and systematize the main factors of investment attractiveness of national economies and assessment methods that allow an objective comparison of the investment attractiveness of individual countries, as well as to propose and analyze new methods to increase the country's competitiveness in the global private investment market. To achieve this goal, a classification of the most important indicators and measures that directly affect the investment climate of states was carried out, as well as an in-depth comparative analysis of the attractiveness of the world's largest economies. The scientific novelty of the work lies in an integrated approach to the analysis of the investment attractiveness of national economies, combining traditional macroeconomic factors with the study of innovative mechanisms for attracting foreign investment, as well as in the development and proposal of new methods and tools for attracting investments in foreign currencies for individuals. This article uses classical research approaches such as inductive and deductive analysis, empirical observations, synthetic generalizations and causal analysis, and comparison. The empirical base of the study was made up of data from the World Bank and the International Monetary Fund. The final part of the paper summarizes the results, emphasizing the importance of traditional and innovative factors that form the overall picture of the investment attractiveness of countries.