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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. To keep the lesson grounded in practicality, we'll use ROE to better understand Delta Air Lines, Inc. (NYSE:DAL).
Return on equity or ROE is a key measure used to assess how efficiently a company's management is utilizing the company's capital. In simpler terms, it measures the profitability of a company in relation to shareholder's equity.
How To Calculate Return On Equity?
The formula for return on equity is:
Return on Equity = Net Profit (from continuing operations) ÷ Shareholders' Equity
So, based on the above formula, the ROE for Delta Air Lines is:
24% = US$3.7b ÷ US$15b (Based on the trailing twelve months to March 2025).
The 'return' is the profit over the last twelve months. Another way to think of that is that for every $1 worth of equity, the company was able to earn $0.24 in profit.
View our latest analysis for Delta Air Lines
Does Delta Air Lines 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. Importantly, this is far from a perfect measure, because companies differ significantly within the same industry classification. As is clear from the image below, Delta Air Lines has a better ROE than the average (12%) in the Airlines 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 2 risks we have identified for Delta Air Lines visit our risks dashboard for free.
How Does Debt Impact Return On Equity?
Companies usually need to invest money to grow their profits. The cash for investment can come from prior year profits (retained earnings), issuing new shares, or borrowing. In the case of the first and second options, the ROE will reflect this use of cash, for growth. In the latter case, the use of debt will improve the returns, but will not change the equity. That will make the ROE look better than if no debt was used.
Combining Delta Air Lines' Debt And Its 24% Return On Equity
It's worth noting the high use of debt by Delta Air Lines, leading to its debt to equity ratio of 1.05. There's no doubt the ROE is impressive, but it's worth keeping in mind that the metric could have been lower if the company were to reduce its 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.