By the end of this lesson you understand what ROE measures and why it relates profit to the capital shareholders have contributed, not to total assets or revenue.
\nWith the income statement, balance sheet, cash flow, and liquidity and debt-to-equity ratios already covered, this module introduces Level 2's first profitability ratio: ROE. Unlike the liquidity and debt-to-equity ratios already covered in Module 5, which answer whether a company can pay its obligations, ROE answers a different question: is the capital shareholders have put into the company being put to good use?
\nROE is calculated by dividing net income, already covered in Module 2, by equity, already covered in Module 3. That choice of denominator is deliberate -- profit isn't compared with total assets (which includes what's financed with debt) or with revenue, but specifically with the part of the company that belongs to its own shareholders. A ROE of 15% means that, for every euro shareholders have invested in the company, it generates 15 cents of net income per year.
\nIt's worth introducing this module's central idea now, which the next two lessons develop in more detail: a high ROE doesn't automatically mean a company is excellent. It can reflect real business efficiency -- it sells with a good margin, or makes very good use of its assets -- or it can be inflated simply because the company finances itself with much more debt than equity. Distinguishing between these two causes, very different in quality, is exactly what the DuPont decomposition allows, the topic of the next lesson.
\nTwo companies can have the same ROE of 20%: one because it runs a genuinely profitable and efficient business, and another because, even though its business is only modestly profitable, it finances itself with much more debt than the first -- looking only at ROE doesn't let you tell which of the two stories is the real one.
\nROE measures how much profit a company generates relative to the capital its own shareholders have invested. A high ROE isn't automatically a good sign -- it can reflect real business efficiency, or be inflated by financial leverage.
\nWhy does ROE compare profit with equity and not with the company's total assets?
\nWhy can two companies with the same ROE be in very different quality situations?
","sortOrder":1,"readingMinutes":9,"difficulty":"Básico"},"previous":null,"next":{"id":44,"moduleId":15,"slug":"what-is-the-dupont-decomposition","title":"What is the DuPont decomposition?","summary":"You understand how the DuPont decomposition splits ROE into margin, efficiency (asset turnover), and leverage, and what each factor reveals separately.","bodyMarkdown":"## Objectives\n\nBy the end of this lesson you understand how the DuPont decomposition splits ROE into margin, efficiency (asset turnover), and leverage, and what each factor reveals separately.\n\n## Content\n\nThe previous lesson left a question open: if two companies have the same ROE, how do you know whether that ROE comes from a genuinely efficient business or simply from more debt? The DuPont decomposition answers exactly that question, splitting ROE into three multiplicative factors that, together, exactly reconstruct it.\n\nThe first factor is net margin -- already covered in general terms in Module 2 -- how much profit is left from each euro of revenue. The second factor is asset turnover: how much revenue the company generates for each euro of assets it holds, a pure measure of efficiency, independent of how much margin each sale leaves. Businesses with low margins, like large retail, usually offset it with very high asset turnover -- they sell a large volume with little margin per unit, but turn their assets over quickly.\n\nThe third factor is financial leverage: how much total assets a company finances relative to its equity. The more debt a company uses to finance its assets instead of its own capital, the higher this factor -- and the greater the multiplying effect it has on ROE, even without any improvement in the business's margin or asset turnover. This is the specific mechanism behind the previous lesson's warning: two companies can reach the same ROE with identical margins and asset turnover, and still have very different leverage -- one generating that ROE with a genuinely efficient business, the other simply taking on more financial risk. Leverage, already covered as the debt-to-equity ratio in Module 5, isn't in itself good or bad -- it depends on whether the company generates enough cash to sustain that debt.\n\nMultiplying margin, asset turnover, and leverage gives you, exactly, ROE -- DuPont isn't an approximation, it's the same figure broken down into its three causes. The next lesson goes deeper into how to use this decomposition to judge ROE's real limitations as an isolated metric.\n\n## Example\n\nA supermarket chain and a heavy machinery manufacturer can reach a similar ROE by opposite paths: the first with low margin and very high asset turnover, the second with high margin and low asset turnover -- DuPont reveals that structural difference the ROE alone hides.\n\n## Common mistakes\n\n- Looking only at the final ROE without breaking it down, losing the information on whether that return comes from margin, efficiency, or leverage.\n- Assuming high leverage is always negative -- on its own it isn't, just as already seen with the debt-to-equity ratio; what matters is whether the company can sustain it.\n\n## Summary\n\nThe DuPont decomposition splits ROE into three multiplicative factors: margin (reusing the general margin concept), asset turnover (efficiency in using assets), and financial leverage. Multiplied together, they exactly reconstruct ROE, and let you tell whether its origin is real efficiency or debt.\n\n## Self-check\n\nWhy can two companies in different sectors reach a similar ROE with very different combinations of margin and asset turnover?\n\nWhy can high leverage raise ROE without either the business's margin or asset turnover improving?","bodyHtml":"By the end of this lesson you understand how the DuPont decomposition splits ROE into margin, efficiency (asset turnover), and leverage, and what each factor reveals separately.
\nThe previous lesson left a question open: if two companies have the same ROE, how do you know whether that ROE comes from a genuinely efficient business or simply from more debt? The DuPont decomposition answers exactly that question, splitting ROE into three multiplicative factors that, together, exactly reconstruct it.
\nThe first factor is net margin -- already covered in general terms in Module 2 -- how much profit is left from each euro of revenue. The second factor is asset turnover: how much revenue the company generates for each euro of assets it holds, a pure measure of efficiency, independent of how much margin each sale leaves. Businesses with low margins, like large retail, usually offset it with very high asset turnover -- they sell a large volume with little margin per unit, but turn their assets over quickly.
\nThe third factor is financial leverage: how much total assets a company finances relative to its equity. The more debt a company uses to finance its assets instead of its own capital, the higher this factor -- and the greater the multiplying effect it has on ROE, even without any improvement in the business's margin or asset turnover. This is the specific mechanism behind the previous lesson's warning: two companies can reach the same ROE with identical margins and asset turnover, and still have very different leverage -- one generating that ROE with a genuinely efficient business, the other simply taking on more financial risk. Leverage, already covered as the debt-to-equity ratio in Module 5, isn't in itself good or bad -- it depends on whether the company generates enough cash to sustain that debt.
\nMultiplying margin, asset turnover, and leverage gives you, exactly, ROE -- DuPont isn't an approximation, it's the same figure broken down into its three causes. The next lesson goes deeper into how to use this decomposition to judge ROE's real limitations as an isolated metric.
\nA supermarket chain and a heavy machinery manufacturer can reach a similar ROE by opposite paths: the first with low margin and very high asset turnover, the second with high margin and low asset turnover -- DuPont reveals that structural difference the ROE alone hides.
\nThe DuPont decomposition splits ROE into three multiplicative factors: margin (reusing the general margin concept), asset turnover (efficiency in using assets), and financial leverage. Multiplied together, they exactly reconstruct ROE, and let you tell whether its origin is real efficiency or debt.
\nWhy can two companies in different sectors reach a similar ROE with very different combinations of margin and asset turnover?
\nWhy can high leverage raise ROE without either the business's margin or asset turnover improving?
","sortOrder":2,"readingMinutes":10,"difficulty":"Intermedio"},"pathContext":null,"curatedLinks":{"prerequisite":[],"continuation":[],"related":[]},"relatedConcepts":[{"concept":{"id":55,"slug":"roe","term":"ROE","shortDefinition":"The return a company generates on the capital its own shareholders have invested -- net income divided by equity.","longDefinition":"ROE (Return on Equity) measures how much profit a company generates in relation to the capital its own shareholders have invested -- it's calculated by dividing net income by equity, both already covered in earlier modules. It's the first profitability ratio in this level, distinct from the liquidity and debt-to-equity ratios already covered: it doesn't measure whether the company can pay its debts, but whether shareholders' capital is being put to good use. A high ROE doesn't automatically mean a company is excellent -- it may reflect real business efficiency, or it may be inflated by a high level of financial leverage. Distinguishing between the two causes is exactly what the DuPont decomposition allows."}}]}