While some investors are already well versed in financial metrics (hat tip), this article is for those who would like to learn about Return On Equity (ROE) and why it is important. To keep the lesson grounded in practicality, we'll use ROE to better understand Spark New Zealand Limited (NZSE:SPK).
Return on equity or ROE is an important factor to be considered by a shareholder because it tells them how effectively their capital is being reinvested. Simply put, it is used to assess the profitability of a company in relation to its equity capital.
How Is ROE Calculated?
Return on equity can be calculated by using the formula:
Return on Equity = Net Profit (from continuing operations) ÷ Shareholders' Equity
So, based on the above formula, the ROE for Spark New Zealand is:
28% = NZ$408m ÷ NZ$1.4b (Based on the trailing twelve months to December 2020).
The 'return' is the income the business earned over the last year. Another way to think of that is that for every NZ$1 worth of equity, the company was able to earn NZ$0.28 in profit.
Does Spark New Zealand 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. Importantly, this is far from a perfect measure, because companies differ significantly within the same industry classification. As you can see in the graphic below, Spark New Zealand has a higher ROE than the average (10%) in the Telecom industry.
That's clearly a positive. Bear in mind, a high ROE doesn't always mean superior financial performance. Aside from changes in net income, a high ROE can also be the outcome of high debt relative to equity, which indicates risk. To know the 3 risks we have identified for Spark New Zealand visit our risks dashboard for free.
How Does Debt Impact Return On Equity?
Most companies need money -- from somewhere -- to grow their profits. The cash for investment can come from prior year profits (retained earnings), issuing new shares, or borrowing. 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. Thus the use of debt can improve ROE, albeit along with extra risk in the case of stormy weather, metaphorically speaking.
Spark New Zealand's Debt And Its 28% ROE
It's worth noting the high use of debt by Spark New Zealand, leading to its debt to equity ratio of 1.19. While no doubt that its ROE is impressive, we would have been even more impressed had the company achieved this with lower debt. Debt increases risk and reduces options for the company in the future, so you generally want to see some good returns from using it.
Return on equity is one way we can compare its business quality of different companies. Companies that can achieve high returns on equity without too much debt are generally of good quality. If two companies have around the same level of debt to equity, and one has a higher ROE, I'd generally prefer the one with higher ROE.
Having said that, while ROE is a useful indicator of business quality, you'll have to look at a whole range of factors to determine the right price to buy a stock. It is important to consider other factors, such as future profit growth -- and how much investment is required going forward. So you might want to take a peek at this data-rich interactive graph of forecasts for the company.
Of course Spark New Zealand may not be the best stock to buy. So you may wish to see this free collection of other companies that have high ROE and low debt.
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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. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.
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