The essence of the lesson
Price is the number the market is trading at, while value is the economic estimate based on cash flows, assets, risks and future prospects.
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
Investment opportunities arise when prices deviate significantly from the estimated value and investors understand why the deviation exists. Prices can change minute by minute because of supply and demand and psychology, but value usually changes more slowly according to the asset's cash-generating capacity and risk.
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
Before buying, write two separate sentences: what the market is paying and what assumptions you base your estimate of fair value on.
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
Mistaking lower historical prices for cheap valuations.
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.