Changes in the bond value is inversely related to the change in the interest rates. If an investor holds a long bond position, he would incur loss if the interest rates increase and an investor who holds a short bond position would incur loss if the interest rates decreases. It is very important for a manager to quantify the outcome of a rate change in order to control interest rate risk. To measure interest rate risk exposure properly, a reliable valuation model is to be used. Valuation model helps to accurately determine the value of a position after an adverse rate move.