The essence of the lesson
Cyclical businesses need to be valued by returns normalized over the cycle, not just by results at peaks or troughs.
Valuation is not about finding a perfect number. Valuation is the process of turning knowledge about the business, cash flows, risks and time horizon into a reasonable range of value. That value range helps investors compare with market prices and make more disciplined decisions.
Analytical framework
Industries such as commodities, real estate, banking, transportation or heavy industry often have revenues, margins and valuations that fluctuate wildly over the cycle. A low P/E at the earnings peak can be a cheap trap, while a high P/E at the bottom may not be expensive if earnings are temporarily depressed.
A good valuation model must be consistent with the quality of the business. A high-growth business that requires too much capital may not be worth as much as it seems. Businesses with high margins but weak moat also need to be discounted. Conversely, stable businesses with good cash flows and reliable management may deserve higher-than-average valuations.
How to apply
Estimate average profits over the cycle and whether the balance sheet is strong enough to survive the cycle bottom.
When valuing, start with simple assumptions and test sensitivity before building complex models. Ask whether the results depend most on growth, margins, cost of capital or terminal value. If even a small change causes the conclusion to reverse, decide that a larger margin of safety is needed.
Mistakes to avoid
Use the peak profit to set the price as if it were a sustainable level.
Valuation can create a sense of control because the spreadsheet has a lot of numbers. But the future is not as precise as a spreadsheet. Always present valuations as ranges, clearly state key assumptions, and connect results to position size rather than looking at valuation as the only answer.