Valuation · Stocks Explained
Change the business assumptions
A bear case should describe how demand, pricing, margins, funding or competition deteriorates. An optimistic case should explain what must go right. Avoid producing scenarios by adding and subtracting an arbitrary percentage from one price target.
Keep assumptions internally consistent. Rapid growth may require more investment and inventory. A recession can lower both profit and the valuation multiple investors accept. Debt can make the equity outcome more sensitive than the operating outcome.
Calculate an illustrative range
Suppose estimated equity values per share are $30 in a weak case, $50 in a central case and $70 in a strong case. At a quoted price of $40, the central case suggests 25% upside, while the weak case implies a 25% loss. These are scenarios, not forecasts.
If an analyst assigns weights of 25%, 50% and 25%, the weighted value is $50. Those subjective weights do not establish a measurable chance of success. Show them separately so the reader can challenge them.
Define the margin of safety
Using an estimated value of $50 and a purchase price of $40, the discount to estimated value is 20%. The potential rise from price to estimated value is 25%. Both calculations are correct, but they use different denominators.
A margin of safety can absorb some estimation error. It cannot make a mistaken business model correct or guarantee that a market price will reach the estimate. More fragile businesses may require greater caution rather than simply a lower entry price.
Choose a review trigger
Record the evidence that would change each scenario. Examples include customer retention, a debt refinancing, unit profitability or capacity additions. Set review dates tied to information releases rather than daily price movement alone.
Revisit the valuation when facts change. Do not lower the estimated value solely to rationalise a falling price or increase it solely because the shares rise. Separate new evidence from a change in sentiment.
Try it yourself
A share trades at $36 against an estimated value of $45. Calculate the discount to value and the rise needed to reach that value.
Show the worked answer
The discount is $9 divided by $45, or 20%. The rise from price is $9 divided by $36, or 25%. Neither calculation measures the probability that the estimate is correct.
Further reading
Educational material. Examples are hypothetical and do not recommend a security or a personal allocation.
