CompoundEU · Independent research on European equities
Reinvestment runway: reading segment disclosure properly
Group-level returns average away the thing that matters. Segment capital employed, where it is disclosed, shows whether incremental capital is going into the business that earns or the one that dilutes.
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A group return on capital is an average, and averages hide the question worth answering: where is the next unit of capital going, and what does it earn there?
Why the group figure misleads
Consider a business with two segments of similar size — one earning well above its cost of capital, one below it. The group figure lands somewhere in the middle and looks unremarkable. Whether the company is a compounder or a value trap depends entirely on which segment is absorbing the capital expenditure, and the group figure cannot tell you.
The same arithmetic works in reverse. A group return that is drifting down is often read as competitive deterioration when it is mix: the high-return segment is capital-light and cannot absorb reinvestment, so growth capital necessarily goes somewhere less attractive.
That distinction changes the valuation completely, and it is visible in the segment note.
What the split looks like in practice
The pattern is easiest to see when the segment figures are set beside the group average that hides them:
The group figure is unremarkable. The two segments behind it are not, and the one absorbing the capital is the weaker of the two.
Segment B share of group capital expenditure
Set out year by year, the direction of travel is clearer than any single snapshot:
| Year | Segment A capex | Segment B capex | Group ROIC |
|---|---|---|---|
| 2021 | 118 | 242 | 15.8% |
| 2022 | 104 | 288 | 15.1% |
| 2023 | 96 | 331 | 14.0% |
| 2024 | 91 | 377 | 13.4% |
| 2025 | 88 | 404 | 12.6% |
What the note needs to contain
Segment reporting standards require revenue and result by segment. They do not always require capital employed, and companies vary in what they volunteer:
- Segment assets and liabilities — sometimes given, sometimes only assets
- Segment capital expenditure — more commonly given
- Depreciation by segment — usually given
Where capital employed is missing, segment capex against segment depreciation is a workable substitute for the direction of travel. A segment investing well above its depreciation is where the capital is going, whatever the strategy section emphasises.
Reading the runway
Once the destination of capital is clear, the question becomes how long it can continue. A high-return segment with a long runway is worth a great deal; the same segment with the runway nearly exhausted is worth much less, because future capital will earn the lower rate.
Store counts, addressable geographies, and capacity utilisation are the usual places that constraint becomes visible.
compoundeu.com/articles/reinvestment-runway-segment-disclosure