The final thesis "Finanční krize -- sekuritizace a ratingové agentury" examines factors that have contributed to the current financial crisis. In the first part, I analyze problems connected with boom of inadequately regulated securitization in last decade. I describe the process of securitization, what was the motivation of banks and investors for using securitization, what made securitization unsuccessful and what problems it caused on the financial market. It the second part, I analyze influence of government-sponsored entities Fannie Mae and Freddie Mac on current financial situation. In the third part, I examine the role of rating agencies in this crisis and failure of techniques that they have used for credit rating of structured obli...