Description: The objective of this paper is to analyze the nature of the probability density function of rates of return on common stocks, to develop a simulation model for evaluating the net risk premium for an asset value guarantee at the end of a specified investment period under an equity-based product and to analyze the sensitivity of the net risk premium to changes in several underlying parameters. From Transactions of Society of Actuaries 1969, Vol. 21, Pt. 1, No. 61.