LAUSR

Abstract A collateralized debt obligation (CDO) is a type of structured asset-backed security. The assets are pooled together and divided into tranches to be sold to investors. Each tranche has a substantially different credit quality and risk level. Jaio and Kaouri (2009), Neammanee and Yonghint (2020) found bounds in Poisson approximation and mean of a percentage loss for each tranche in CDO where all reference assets are independent. In this article, we consider reference assets without assuming independent. Assume that a default of reference asset may not effect to every assets, we say that all assets in CDO are locally dependent CDO. In this work, we use Stein-Chen’s method to find bounds in Poisson approximation in the case of locally dependent CDO. These bounds are better than results of Neammanee and Yonghint (2020).