The article reveals the importance of transnational banks, their role in the development of international economic relations, the causes of their emergence, as well as their advantages over the other banking structures; the impact of their activities on the development of the economy and financial sector of developing countries is assessed, by analyzing the results obtained with the construction of regression models. Urgency of the research. In connection with the intensification of the

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... ation processes which are taking place in the world economy and the financial sector, the interconnection of national economies is strengthening, the role of external factors in economic development is increasing, and the financial markets are converging. Target setting. The world economy is a complex system which is formed under the influence of various factors. The main place in the world financial market among its many participants is occupied by transnational banks which can provide a wide range of needs of all participants in international economic relations. Therefore the issue of analyzing the influence of transnational banks on the economic and financial sector of the country is very important. Actual scientific researches and issues analysis. The study of the activities of transnational banks, their influence on the world economy, the evaluation of the significance of TNB in the financial sphere was carried out by such scientists as M. Borovinsky, A. Kosevich, V. Kozhina, I. Otmar, A. Romashova, U. Umantseva, R. Peterson. Uninvestigated parts of general matters defining. The study of the influence of transnational banks on selected countries has never been conducted before. As Poland, Turkey and Brazil are among the most successful developing countries in their regions, then by examining the impact of TNBs on their economies and the financial sectors, it will be possible to project results to other countries in the respective regions. The research objective. The main purpose of the article is to identify the factors that have the greatest impact on the economic and financial development of the developing countries by constructing the regression models and analyzing their results. The statement of basic materials. The transnational bank is a large universal bank that performs an intermediary role in the international movement of loan capital. It usually relies on a network of foreign branches, controls foreign exchange and credit operations on the world market with the support of the state [1]. The main purpose of transnational banks is to mobilize and redistribute funds in such a way as to maximize profits. The foreign economic activity of TNB is a generating factor for the expansion and development of globalization processes, the economic ties of most countries in the world. The increasing importance of TNBs in the world economy is explained by the consolidation of banking and industrial capital, which is an important trend in modern economic relations. If previously TNBs were issuing loans, mainly on foreign trade transactions, now they are crediting any operations of their clients. One of the main activities of TNBs is the acceptance of deposits. For transnational banks this operation has acquired features related to the international scope of activity. The features that distinguish TNB operations from the operations of national banks are the following: mobilization of capital, its further movement from country to country in order to obtain maximum profit, a high level of flexibility in management. TNB covers all types of savings, from government to small investors.