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Forward Rate Formula (Table of Contents)
What is Forward Rate Formula?
The forward rate refers to the rate that is used to discount a payment from a distant future date to a closer future date. It can also be seen as the bridging relationship between two future spot rates i.e. further spot rate and closer spot rate.
Forward Rate can be calculated based on spot rate on the further future date and a closer future date and the number of years until the further future date and closer future date.
It is represented as,
where S1 = Spot rate until a further future date,
- S2 = Spot rate until a closer future date, n1 = No. of years until a further future date,
- n2 = No. of years until a closer future date
The notation for formula is typically represented as F(2,1) which means one-year rate two years from now.
Explanation of the Forward Rate Formula
The forward rate formula can be derived by using the following steps:
Step 1: Firstly, determine the spot rate till the further future date for buying or selling the security and it is denoted by S1. Also, compute the no. of the year till the further future date and it is denoted by n1.
Step 2: Next, determine the spot rate till the closer future date for selling or buying the same security and it is denoted by S2. Then, compute the no. of the year till the closer future date and it is denoted by n2.
Step 3: Finally, the calculation of forward rate for (n1 – n2) no. of years after n2 no. of years is shown below.
Forward rate Formula = [(1 + S1)n1 / (1 + S2)n2]1/(n1-n2) – 1
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Examples of Forward Rate Formula(with Excel Template)
Let’s see some simple to advanced examples of Forward Rate formula to understand it better.
Forward Rate Formula – Example#1
Let us take the example of a company PQR Ltd which has issued bonds recently to raise money for its upcoming project to be completed in the next two years. The bonds issued with one-year maturity have offered 6.5% as return on investment, while the bonds with two years maturity have offered 7.5% as return on investment. Based on the given data, calculate the one-year rate one year from now.
- Spot rate for two years, S1 = 7.5%
- Spot rate for one year, S2 = 6.5%
- No. years for 2nd bonds, n1 = 2 years
- No. years for 1st bonds, n2 = 1 year
As per above-given data, we will calculate a one-year rate from now of company POR ltd.
Therefore, calculation of one year forward rate one year from now will be,
F(1,1) = [(1 + S1)n1 / (1 + S2)n2]1/(n1-n2) – 1
= [(1 + 7.5%)2 / (1 + 6.5%)1]1/(2-1) – 1
One year Forward Rate one year from now= 8.51%
Forward Rate Formula – Example#2
Let us take the example of a brokerage firm that has been in the business for more than a decade. The firm has provided the following information. The table gives a snapshot of the detailed calculation of the forward rate.
- Spot rate for one year, S1 = 5.00%
- F(1,1) = 6.50%
- F(1,2) = 6.00%
Based on the given data, calculate the spot rate for two years and three years. Then calculate the one-year forward rate two years from now.
- Given, S1 = 5.00%
- F(1,1) = 6.50%
- F(1,2) = 6.00%
Following is the given data for calculation of forward rate of brokerage firm.
Therefore, spot rate for two years can be calculated as,
S2 = [(1 + S1) * (1 + F(1,1))]1/2 – 1
= [(1 + 5.00%) * (1 + 6.50%)]1/2 – 1
Spot Rate for Two Years = 5.75%
Therefore, calculation of spot rate for three years will be,
S3 = [(1 + S1) * (1 + F(1,2))2]1/3 – 1
= [(1 + 5.00%) * (1 + 6.00%)2]1/3 – 1
Spot Rate for Three Years= 5.67%
Therefore, calculation of one year forward rate two years from now will be,
F(2,1) = [(1 + S3)3 / (1 + S2)2]1/(3-2) – 1
= [(1 + 5.67%)3 / (1 + 5.75%)2] – 1
One year Forward Rate Two Years= 5.50%
Relevance and Uses
The forward rate is an assessment of what the market believes will be the interest rates in the future for varying maturities. The forward rate formula also helps in deciphering the yield curve which is a graphical representation of yields on different bonds having different maturity periods.
For instance, let us assume that Jack has received money today and he wants to save the money to buy a real estate one year from today. Now, he can invest the money in government securities to keep it safe and liquid for the next year. However, in that case, Jack has two choices: He can either buy a government bond that will mature in one year, or he can opt to buy another government bond that will mature in six months, and then roll over the money for another six-month government bond when the first one matures.
In case both the options generate the same return on investment, then Jack will be indifferent and go with either of the two options. But what if the interest offered is higher for a six-month bond than the one-year bond. In that case, he will make more money by buying the six-month bond now and rolling it over for another six months. Now, It comes into play to calculate the return of the six-month bond six months from now. In this way, forward rate formula can help Jack to take advantage of such time-based variation in yield.
This has been a guide to Forward Rate Formula. Here we discuss how to calculate Forward Rate along with the practical examples and downloadable excel sheet. You can learn more about accounting from the following articles –