# Vasicek Interest Rate Model - Explained

What is the Vasicek Interest Rate Model?

# What is the Vasicek Interest Rate Model?

The Vasicek interest rate model is a model that exhibits fluctuations or movements in interest rate. This mathematical model tells how factors such as market risk, time, and equilibrium price affect the interest rate movements. Here, the interest rate responds towards the average of the factors over a period of time. Most importantly, it ascertains the point that will mark the end of interest rates at the end of a specific time period, provided a specific market risk factor, volatility in the current market, and the average interest rate value in the long term. However, one must know that this equation has the ability to evaluate only one market risk factor at one point of time. This model is considered for knowing the value of interest rate futures, as well as for identifying the prices of several bonds that are not easy to value.

Back to:ECONOMIC ANALYSIS & MONETARY POLICY

# How does the Vasicek Interest Rate Model Work?

The Vasicek interest rate model ascertains the value of interest rate by considering the following equation: drt = a (b rt) dt + dWt where: W stands for random market risk (displayed by a Wiener process) t stands for time period a (brt) stands for the Expected change in the interest rate at time t (the drift factor) a stands for the speed of the reversion to the mean B stands for the long-term level of the mean stands for volatility at time t stands for variable derivative that follows it

# How is The Vasicek Interest Rate Model Used?

The concept of Vasicek interest rate model is applied to financial economics so as to make predictions for prospective pathways in case of interest rate fluctuates ahead. This model is based on the belief that the random market fluctuations have a significant effect on the interest rate movements. In case, the market fluctuations are zero, or when dWt is equal to 0, there is no movement in the interest rate, that means rt = b. When rt is less than b, the drift factor turns out to be positive. This positive value signifies that the rate of interest will go up in the direction of equilibrium. Though this model is impressive when it comes to predicting financial equations, but it is recently known that the interest rate under this model doesnt go beyond zero, or doesnt turn out to be negative. This drawback was ascertained during the huge financial crisis. Several models such as the Cox-Ingersoll-Ross model and the exponential Vasicek model which were formulated after the Vasicek model, overcame this issue for predicting the movements in interest rates.

Related Topics