In Seth Klarman’s book Margin of Safety he provides some great insights into how investors can calculate a company’s present-value saying:
At times when interest rates are unusually low, however, investors are likely to find very high multiples being applied to share prices. Investors who pay these high multiples are dependent on interest rates remaining low, but no one can be certain that they will. This means that when interest rates are unusually low, investors should be particularly reluctant to commit capital to long-term holdings unless outstanding opportunities become available, with a preference for either holding cash or investing in short-term holdings that quickly return cash for possible redeployment when available returns are more attractive.
Investors can apply present-value analysis in one of two ways. They can calculate the present-value of a business and use it to place a value on its securities. Alternatively, they can calculate the present-value of the cash flows that security holders will receive: interest and principal payments in the case of bondholders and dividends and estimated future share prices in the case of stockholders.
Calculating the present value of contractual interest and principal payments is the best way to value a bond. Analysis of the underlying business can then help to establish the probability that those cash flows will be received. By contrast, analyzing the cash flows of the underlying business is the best way to value a stock. The only cash flows that investors typically receive from a stock are dividends.
The dividend-discount method of valuation, which calculates the present value of a projected stream of future dividend payments, is not a useful tool for valuing equities; for most stocks, dividends constitute only a small fraction of total corporate cash flow and must be projected at least several decades into the future to give a meaningful approximation of business value. Accurately predicting that far ahead is an impossibility.
Once future cash flows are forecast conservatively and an appropriate discount rate is chosen, present value can be calculated. In theory, investors might assign different probabilities to numerous cash flow scenarios, then calculate the expected value of an investment, multiplying the probability of each scenario by its respective present value and then summing these numbers. In practice, given the extreme difficulty of assigning probabilities to numerous forecasts, investors make do with only a few likely scenarios.
They must then perform sensitivity analysis in which they evaluate the effect of different cash flow forecasts and different discount rates on present value. If modest changes in assumptions cause a substantial change in net present value, investors would be prudent to exercise caution in employing this method of valuation.
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