My research focuses on Probability Theory, especially the limit theorems. I have been using the Stein’s method to price a collateralized debt obligation (CDO). A total loss in the CDO was modeled to be a call function of a summation of random variables and was approximated by a normal approximation. In addition, I am interested in the relation among random variables such as transforming independent random variables to local dependent random variables. The transformation gives more realistic applications in various areas such as graph theory, biology, and finance, etc. Recently, I have also researched in a local limit theorem for a Poisson binomial random variable.