Liudmyla Prymostka

The article intends to evaluate the efficiency and performance of Ukrainian banking system based on two stages. The first stage, when the number of banks was on average the same during that period, and the second stage, that began in 2015 and when the number of banks began to fall quickly up to 82 institutions in 2018. The study is based on the model of dynamics norm of the banking system efficiency for two periods.
The concept of efficiency was used based on the methods of non-parametric statistic to obtain performance estimates. The implementation of a dynamic model, based on the peculiarities of the banking system functioning, allows to obtain a generalized assessment of the economic efficiency of banking activity before and after critical change in the number of bank institutions. The correlation matrix between financial indicators of the banking system activity was created and the dynamic norm for the two periods was calculated. Given the analytical comparison of indicators, more effective period was identified. The general results of the study indicate that the overall efficiency of the banking system started to grow up since 2015.

This study is devoted to assessing the level of individual segments interconnectedness within the financial market of Ukraine (FMU) and their dynamics in uncertain conditions. The methodology of the systematic approach is used to investigate the dynamic relationship between individual segments of the financial market of Ukraine, namely credit (deposit-credit) market, stock market (market of securities), government securities market, currency market, and interbank market. The study of financial market dynamics focuses on the description of the price indicators of individual market segments, which are monitored using time series analysis and statistical methods. The results of the time series assessment revealed the fractal characteristics of the Ukrainian financial market as a measure of sustainability (namely inertia). It is revealed that all segments of the financial market, except credit, are characterized by persistence. It is established that the development of market segments is uneven and is characterized as bifurcation. The credit segment is addicted to insider behavior and has the highest risk concentration. It is revealed that the foreign exchange market is still in crisis. The results of modeling the correlation relationships between market segments have shown that, in the presence of such relationships, they differ in the strength and nature of the interaction. They are volatile, unstable, and situational, dependent on external conditions. The credit market has a relationship with other segments, not significantly strong but stable. The results of the analysis indicate the dynamic development of segments within the Ukrainian financial market in the presence of interconnections between them.

Acknowledgment
The study was conducted within the framework of the State Budget of the Kyiv National Economic University named after Vadym Hetman on the topic “Innovative development of banking activities in the integrated financial environment” (state registration number 0117U001178).