Valuing Surrender Options in Korean Interest Indexed Annuities

We present surrender rate models with explanatory variables such as the difference between reference rates and crediting rates, policy age since issue, unemployment rates, and economy growth rates, using a logit model. We calculate the values of the surrender options in Korean interest-indexed annuities. It is interesting to note that the values of the surrender options subject to a surrender charge show negative values despite the fact that the surrender options are the right given to policyholders. We then attempt to find the fair surrender charges for the insurance company and its policyholders.