
TIPS AND TRICKS FROM EIQF: BESSEL’S CORRECTION
Youtube Linkedin Envelope Table of Contents Have you ever wondered why, when calculating the standard deviation, we sometimes divide by 𝓷 and sometimes by 𝒏-1?
With our EIQF TIPS AND TRICKS, we would like to explain topics that we are frequently asked about by finance professionals and our students.
When valuing companies using discounted cash flows (DCF), accuracy is crucial—especially when discounting the Terminal Value (TV). However, even experienced analysts often make a conceptual error here.
Calculating the present values for the first five planning years usually poses no problem. Each expected cash flow is discounted using a discount factor (1/(1+i)^t). The variable t represents the respective year: t = 1 for the first year, t = 2 for the second—and so on up to t = 5.
Significantly more uncertainty exists regarding the correct exponent t for the discount factor of the Terminal Value. A common assumption is that the Terminal Value is generated in year t = 6 and is therefore discounted with t = 6. However, this is an error. The correct exponent is t = 5.
A simple example helps illustrate this: If a payment of 10 euros occurs for the first time in year t = 1 and then annually towards infinity, the present value is 10/0.1=100 and refers to the year t = 0. From this, we can draw the following conclusion: when we discount cash flows, the present value of these payments always refers to the point in time one period before the first cash flow occurs.
The same applies to the calculation of the Terminal Value: The TV is the present value of the payments in the continuing period, which arise in years t = 6, …, ∞. The Terminal Value aggregates all future payments from year t = 6 onwards—however, its calculation refers to the valuation date t = 5, i.e., one period before the first cash flow of the continuing period.
If the Terminal Value is dated at t = 5, it must be discounted five times—just like the cash flow from the last planning year—to determine the present value (t = 0). The Terminal Value and the cash flow of year t = 5 are thus discounted with the same discount factor.
Those interested in other topics we address at the European Institute of Quantitative Finance are welcome to visit our redesigned homepage www.eiqf.de. Under BLOG, you will find articles, videos, and podcasts.
Warm regards until the next EIQF TIPS AND TRICKS
Dietmar Ernst and Joachim Häcker

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