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What’s NPV?

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Net present value (NPV) is used to compare investments by calculating the present value of expected cash flows. The discount rate is used to discount expected earnings to present value. The NPV is usually calculated alongside the internal rate of return (IRR) to evaluate profitability.

The net present value (NPV) refers to the present value of the expected cash flows. It is used to compare different investments, whether they are internal investments of a company, usually called projects, or external investments made by a company or an individual. Net present value is used because it can be difficult to compare investments, particularly when there are different investment values ​​or different expected earnings payable at different times. By using the present value of these estimated investments and the expected returns, the investments can be compared evenly and a decision can be made based on which is the most profitable.

To calculate the net present value of a project or investment, the value of the expected earnings must first be discounted to the present value. The rate at which expected earnings are discounted is called the discount rate or hurdle rate. Typically, the discount rate is calculated by determining the amount of interest the investor could earn in the time period used, usually one year, if invested in a safer investment, such as letting money earn interest in a checking account. savings.

To calculate the NPV, one first needs to determine what the expected cash flows will be over the life of the investment, treating the initial investment as negative cash flow. Next, the discount rate must be determined by stating what the rate of return would be if the safest investment were chosen. The discount rate is used to discount the expected cash flows as follows.

VPN = C0 + (Ct / ((1 + r) t));

C0 is the initial capital outlay

Ct is the expected cash flow in a given period of time (i.e., annually)

r is the discount rate (the interest on the safe investment)

t is the time period (ie first year, second year)

When using net present value to assess the profitability of a project or investment, it should generally be remembered that this method assumes that conditions remain stable over the life of the project or investment, a scenario that rarely occurs today. Also, the discount rate is based on an assumption of what the safe investment would be. A variety of methods can be used to determine the discount rate, from using the interest rate on a 10-year bond to applying the Capital Asset Pricing Model (CAP-M). Whichever method is used, a sensitivity analysis on the discount rate should be performed to see how much profitability may differ between projects or investments given the different scenario.

The net present value is usually calculated tangent to the internal rate of return (IRR) of the same project or investment. The internal rate of return is calculated by determining the discount rate for which the net present value would be zero. While there will be multiple solutions for the internal rate of return for each scenario, the net present value may not always correlate with the internal rate of return, and the internal rate of return has the disadvantage of using only one value for the entire time period. , while the net present value can be calculated using different discount rates for different periods. The calculation of the internal rate of return gives the evaluation of the profitability of the project or investment a new perspective.

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