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The main objects of this diploma thesis are basic trends in the mortgage market in the United States and their role in the current mortgage crisis. As a theoretical background in the first part of this work are mentioned asymetric information with the optimal consumer choice regarding mortgage product and the general theory of the securitization. Practical part continues from the description of the main characteristics of the mortgage to the whole mortgage market and the role of government agencies. Following analysis is concerning the significant tendencies in the past years, which dominates in the mortgage market in the USA. The focus is mainly aimed at the growth of alternative mortgage products in connection with strong home price apreciation. Then the position of mortgage brokers and their role in the subprime sector are discusssed. Subprime sector is analysed as well and then the securitization of mortgages as the main trend in the past years is investigated. The development of the current crisis is the object of the last chapter.

The aim of this diploma thesis is an analysis of the contemporary mortgage crisis in the USA. The thesis consists of four sections. The first part describes historical developments of the American mortgage market with the emphasis on securitization. The second chapter deals with the market failures occurring within the securitization process. The third chapter is dedicated to the primary mortgage market, in particular to the causes of the previous credit boom, "running" house prices. Moreover, this chapter analyzes the "subprime" and "Alt-A" mortgage market, their products and practices prevailing on these markets. The last chapter is devoted to the secondary mortgage markets. The aim of this chapter is to describe how "subprime" and "Alt-A" mortgage deals were structured. The case study offers an example and its results are presented.