Many investors are still learning about the various metrics that can be useful when analysing a stock. This article is for those who would like to learn about Return On Equity (ROE). To keep the lesson grounded in practicality, we'll use ROE to better understand Neoen S.A. (EPA:NEOEN).

Over the last twelve months Neoen has recorded a ROE of 3.8%. That means that for every €1 worth of shareholders' equity, it generated €0.04 in profit.

View our latest analysis for Neoen

How Do I Calculate Return On Equity?

The formula for ROE is:

Return on Equity = Net Profit ÷ Shareholders' Equity

Or for Neoen:

3.8% = €23m ÷ €621m (Based on the trailing twelve months to June 2019.)

Most readers would understand what net profit is, but it’s worth explaining the concept of shareholders’ equity. It is the capital paid in by shareholders, plus any retained earnings. The easiest way to calculate shareholders' equity is to subtract the company's total liabilities from the total assets.

What Does Return On Equity Signify?

ROE measures a company's profitability against the profit it retains, and any outside investments. The 'return' is the profit over the last twelve months. A higher profit will lead to a higher ROE. So, all else being equal, a high ROE is better than a low one. That means ROE can be used to compare two businesses.

Does Neoen Have A Good ROE?

By comparing a company's ROE with its industry average, we can get a quick measure of how good it is. However, this method is only useful as a rough check, because companies do differ quite a bit within the same industry classification. Pleasingly, Neoen has a superior ROE than the average (2.6%) company in the Renewable Energy industry.

That's what I like to see. In my book, a high ROE almost always warrants a closer look. One data point to check is if insiders have bought shares recently.

How Does Debt Impact Return On Equity?

Companies usually need to invest money to grow their profits. That cash can come from retained earnings, issuing new shares (equity), or debt. In the first two cases, the ROE will capture this use of capital to grow. In the latter case, the debt used for growth will improve returns, but won't affect the total equity. That will make the ROE look better than if no debt was used.

Combining Neoen's Debt And Its 3.8% Return On Equity

Neoen clearly uses a significant amount of debt to boost returns, as it has a debt to equity ratio of 2.89. Its ROE isn't too bad, but it would probably be very disappointing if the company had to stop using debt. Debt does bring extra risk, so it's only really worthwhile when a company generates some decent returns from it.