Why ROIC is the most important metric

Return on invested capital (ROIC) answers one question: for every dollar this business reinvests, how much does it earn back each year? It's the single best measure of whether a business is genuinely creating value or just consuming capital to grow.

The compounding machine

A business with 30% ROIC earns $0.30 for every $1.00 reinvested. If it can reinvest those earnings at 30% too, the entire enterprise compounds at 30% per year. Over a decade, $100 becomes $1,379. That's why high-ROIC businesses are sometimes called compounding machines — they don't just grow, they grow on top of their growth.

Low-ROIC businesses face the opposite problem. They may grow revenues quickly, but if they need to invest heavily in capital to support that growth — through factories, inventory, acquisitions — shareholders see little of it. High revenue growth funded by capital destruction is not wealth creation.

What ROIC measures

Invested capital is roughly total assets minus non-interest-bearing current liabilities minus excess cash — the capital the business actually needs to operate. We track the 3-year average ROIC to smooth out single-year variation.

ROIC and the quality of growth

It's possible to have high EPS growth with low ROIC — usually by taking on debt, issuing shares, or making capital-intensive acquisitions. The Big Five metrics together catch this: a company showing strong EPS growth but weak ROIC may be growing through financial engineering rather than genuine operational improvement.

What ROIC can't tell you

ROIC is backward-looking. A 40% ROIC today reflects past capital allocation decisions, not necessarily future ones. Management turnover, competitive disruption, or industry commoditisation can all erode ROIC going forward. Treat a high historical ROIC as evidence of a strong competitive position — one worth investigating further, not one you can assume will persist without examination.