2. Which value driver is in charge, by type of company

Level 4: What really moves the price

You already know what the value drivers are and you already know how to solve for the one implied in a price. This module does not repeat that. It solves a different and very practical problem: of the four drivers, one almost always takes the bulk of the movement, and the rest are scenery. Start with the wrong one and you spend two weeks of analysis on a variable that is not in charge.

Sensitivity, not importance

The useful question is not which driver is important. They all are. The question is which of them the value of this particular company is sensitive to: what happens to the justified price if you move that driver by a point and hold the others still.

The same percentage point is not worth the same in two different businesses. In a company that reinvests almost everything it earns and grows fast, a point of growth compounds over many years. In a mature company that barely grows, that same point is close to irrelevant, while a point of margin drops straight into next year's cash, and into every year after that. The logic of Rappaport and Mauboussin is exactly this: identify the variable Mauboussin calls the highest-leverage one, and concentrate the work there.

The four profiles and their dominant driver

• Growth company (large market, small share, high reinvestment). Sales growth and its duration are in charge. The value sits a long way out in time, so what matters is not so much this year's margin as how many years it will keep opening up new market. A point of margin moves little; two more years of high growth move a great deal.
• Mature high-margin company (strong brand, stagnant market, little investment). The incremental margin is in charge: how much operating profit each additional euro of sales leaves behind. Because growth is low, almost all the value lies in the ability to defend and widen that margin. Here a point of margin is the news of the year.
• Capital-intensive company (factories, networks, fleets). The capital needed to grow is in charge. Growing is not free: if selling another 100 euros means investing 80 euros first, that growth can destroy value even on a decent margin. The variable to watch is how many euros of investment are needed for each new euro of sales.
• Heavily indebted or very long-duration company (biotech with no product, thirty-year infrastructure, leveraged businesses). The cost of capital is in charge. Here the arithmetic of discounting flattens everything else, which is why these companies move with interest rates more than with their own sales.

The sum that sets the priorities

An example in round numbers, all of it in prose. Two companies are worth 1,000 million today.

The first sells 200 million, grows at 25% a year and has an operating margin of 10%. If the margin rises to 12% — two points, a notable improvement — this year's profit goes from 20 to 24 million: four million. If instead the high growth lasts two years longer than expected, final-year sales go from around 610 to around 950 million, and on that same 10% margin final profit goes from 61 to 95 million. The second lever is several times more powerful than the first.

The second company sells 2,000 million, does not grow and has a margin of 15%. Lifting growth from 0% to 2% adds 40 million of sales and 6 of profit. Lifting the margin by two points, from 15% to 17%, adds 40 million of profit at a stroke and for good. Here the ranking flips: the margin lever is seven times more powerful.

The same nominal improvement, opposite effects. That is why there is no universal list of what to look at in a company: there is a list per profile.

How to spot the profile in five minutes

With no tools and no complicated sums, three signals are almost always enough:

• How much of the value sits in the distant future. If the company earns little or nothing today and is still worth a lot, almost all of its value is growth and duration: driver one or driver four.
• How much has to be invested in order to sell more. If the company talks constantly about factories, capacity, fleet or network, the driver is capital. If it grows with barely any investment, capital is not in charge.
• What happens when interest rates go up a point. If the share collapses on every inflation print and barely reacts to its own sales, the dominant driver is the cost of capital, whatever the presentations say.

One important warning: the dominant driver changes over time. A growth company that saturates its market turns, without warning, into a margin company. A great many analytical errors consist of carrying on watching the growth of a company that stopped playing that game three years ago.

A real case: when the driver in charge is capital

Intel's industrial turn from 2021 onwards makes the point, taking the figures as magnitudes rather than as exact data. The company announced an in-house manufacturing plan that meant multiplying its investment in plants up to levels of tens of billions of dollars a year, far above its historical pace. Its sales did not fall dramatically straight away, and yet the market reacted with sharp falls in the sessions where the capital spending and the new gross margin path were spelled out — a margin that went from moving around the 60% mark to clearly lower levels in the years that followed.

What matters is not the anecdote but the logic: in a capital-intensive company, the news that moves the price is usually not the sale, but how much capital has to be buried to win it and for how many years. An analyst watching revenue growth would have been watching the wrong driver.