This paper deals with the role of structured products in the development of the international financial crisis since 2008. The aim of this paper is to explain the role of structured products, particularly CDOs (Collateralized Debt Obligation) and its modifications to the rise of the international financial crisis since 2008. In that year, a large investment group Lehman Brothers went bankrupt, which rocked the global capital markets, and subsequently a negative sentiment about the quality of loan portfolios was extended, especially of mortgage banks in the US, which by means called moral hazard, increased the value of mortgage loans. The capital guarantee of the largest mortgage banks and insufficient control of federal authorities resulted in the uncontrolled growth of unsecured mortgages and growth of CDO emissions that were linked to these loans. As a consequence of this state assistance was provided, which supplied the necessary liquidity to the banks through conservation programs