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The diploma thesis is focused on analysis of the banking portfolios quality evolution of the Czech market in observed period from 2004 to 2014. In the first part related regulatory rules and their changes are defined. The rules are listed for the categorization of the receivables due from customers, the creation of allowances, the portfolio concentration and the amount of capital. Next part of the thesis is focused on the analysis of the banking portfolios quality evolution of the whole banking sector. In this part are described factors, which influenced the banking sector in observed time period. In the last chapter the thesis examines quality of banking portfolio of three banks in related areas. For the comparison were used chosen financial ratios.

The aim of this diploma thesis is to analyse the development of the regulatory framework and its current state according to the latest Basel III framework. The new rules were created as a response to the financial crisis that started in 2007. The framework represents significant increase in quality, amount and transparency of the capital base in comparison with the pre-crisis situation. Basel III has both micro and macroprudential focus. The diploma thesis describes the development and shortcomings of regulatory framework that necessitated revisions of the regulatory rules over time. These rules evolve with the changes in the financial system and the way how financial risks are managed. Although the roots of financial crisis are related to the mortgage-backed securities market, the banking sector played an important role in spreading the problems. Therefore the diploma thesis will also concentrate on fundamental flaws that contributed to the financial crisis. Then the immediate corrective action taken as a response to the financial crisis are described. After that, the Basel III rules are presented in detail. The newest monitoring of the rules carried out by the Basel Committe and cost analysis carried out by IMF including evaluation based on various analyses of Basel III are presented. Basel III has addressed most of the flaws revealed in Basel II. However, some issues still remain unsolved, which can lead to future problems with the financial system stability.

Stress testing is a general term for framework that can assess possible impact of an adverse shock on the financial health and a capital adequacy of a financial institution or whole financial system. Because credit risk is typically the most important risk for a bank and many international surveys describe the credit risk stress testing as one of the least developed, it is be the main topic of this thesis. The thesis concentrates on the micro level stress tests that are run by each individual bank. It describes the whole credit risk stress testing procedure, Basel II regulatory requirements, the importance for an institution and offers examples of stress tests. The first significant contribution to the topic is a survey of the practice in the mayor Czech banks that analyze whether they are influenced in their credit risk stress testing framework by their parents or the supervisory institution, whether the stress techniques and scenarios vary across the Czech banks considerably and whether the scenarios changed in some way before or during the current crisis. The other contributive part contains a model of stress test on a real corporate credit portfolio of one Czech bank, which uses data on PD for different level of segmentation of this portfolio. The scenarios used are the most actual forecasts of the...