One of the best investments we can make is in our own knowledge and skill set. With that in mind, this article will work through how we can use Return On Equity (ROE) to better understand a business. We'll use ROE to examine Shinelong Automotive Lightweight Application Limited (HKG:1930), by way of a worked example.

Our data shows Shinelong Automotive Lightweight Application has a return on equity of 8.5% for the last year. That means that for every HK$1 worth of shareholders' equity, it generated HK$0.09 in profit.

Check out our latest analysis for Shinelong Automotive Lightweight Application

How Do You Calculate ROE?

The formula for ROE is:

Return on Equity = Net Profit (from continuing operations) ÷ Shareholders' Equity

Or for Shinelong Automotive Lightweight Application:

8.5% = CN¥20m ÷ CN¥239m (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. You can calculate shareholders' equity by subtracting the company's total liabilities from its total assets.

What Does Return On Equity Mean?

Return on Equity measures a company's profitability against the profit it has kept for the business (plus any capital injections). The 'return' is the yearly profit. The higher the ROE, the more profit the company is making. So, all else being equal, a high ROE is better than a low one. Clearly, then, one can use ROE to compare different companies.

Does Shinelong Automotive Lightweight Application Have A Good ROE?

One simple way to determine if a company has a good return on equity is to compare it to the average for its industry. The limitation of this approach is that some companies are quite different from others, even within the same industry classification. As shown in the graphic below, Shinelong Automotive Lightweight Application has a lower ROE than the average (12%) in the Auto Components industry classification.

Unfortunately, that's sub-optimal. We'd prefer see an ROE above the industry average, but it might not matter if the company is undervalued. Nonetheless, it could be useful to double-check if insiders have sold shares recently.

Why You Should Consider Debt When Looking At ROE

Virtually all companies need money to invest in the business, to grow profits. That cash can come from retained earnings, issuing new shares (equity), or debt. In the first and second cases, the ROE will reflect this use of cash for investment in the business. In the latter case, the use of debt will improve the returns, but will not change the equity. Thus the use of debt can improve ROE, albeit along with extra risk in the case of stormy weather, metaphorically speaking.

Shinelong Automotive Lightweight Application's Debt And Its 8.5% ROE

Shareholders will be pleased to learn that Shinelong Automotive Lightweight Application has not one iota of net debt! Even though I don't think its ROE is that great, I think it's very respectable when you consider it has no debt. After all, when a company has a strong balance sheet, it can often find ways to invest in growth, even if it takes some time.

In Summary

Return on equity is one way we can compare the business quality of different companies. In my book the highest quality companies have high return on equity, despite low debt. If two companies have the same ROE, then I would generally prefer the one with less debt.

But when a business is high quality, the market often bids it up to a price that reflects this. It is important to consider other factors, such as future profit growth -- and how much investment is required going forward. Check the past profit growth by Shinelong Automotive Lightweight Application by looking at this visualization of past earnings, revenue and cash flow.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of interesting companies.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Thank you for reading.