| Summary: | Credit derivative has become an important financial instrument in global financial market, it plays significant role in transferring credit risk. During the latest financial crisis, collapse of credit derivative market was a main reason led to this worldwide turmoil. In this thesis, I try to investigate this adverse performance through a case study of Goldman Sach's ABACUS 2007-AC1. I conclude three major findings. First, severe interest conflicts and asymmetric information existed between counterparties in credit derivative market in U.S.. Second, the securities‘ credit ratings provided a downward-biased view of their actual default risks, the yields failed to account for the extreme exposure of structured products to declines in aggregate economic conditions. Third, credit derivatives do not eliminate systematic risk, they just shift the risk, CDOs exchanged diversifiable risk for systematic risk during the structuring process, which was difficult to understand for most of investors, we see risk accumulation rather than spreading risk,
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