Most readers would already be aware that Saia's (NASDAQ:SAIA) stock increased significantly by 31% over the past three months. Given that the market rewards strong financials in the long-term, we wonder if that is the case in this instance. Particularly, we will be paying attention to Saia's ROE today.

Return on equity or ROE is a key measure used to assess how efficiently a company's management is utilizing the company's capital. Simply put, it is used to assess the profitability of a company in relation to its equity capital.

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 Saia is:

17% = US$375m ÷ US$2.2b (Based on the trailing twelve months to September 2024).

The 'return' is the income the business earned over the last year. One way to conceptualize this is that for each $1 of shareholders' capital it has, the company made $0.17 in profit.

Why Is ROE Important For Earnings Growth?

Thus far, we have learned that ROE measures how efficiently a company is generating its profits. Depending on how much of these profits the company reinvests or "retains", and how effectively it does so, we are then able to assess a company's earnings growth potential. Assuming everything else remains unchanged, the higher the ROE and profit retention, the higher the growth rate of a company compared to companies that don't necessarily bear these characteristics.

Saia's Earnings Growth And 17% ROE

To begin with, Saia seems to have a respectable ROE. Further, the company's ROE is similar to the industry average of 16%. Consequently, this likely laid the ground for the impressive net income growth of 26% seen over the past five years by Saia. However, there could also be other drivers behind this growth. For example, it is possible that the company's management has made some good strategic decisions, or that the company has a low payout ratio.

As a next step, we compared Saia's net income growth with the industry, and pleasingly, we found that the growth seen by the company is higher than the average industry growth of 11%.

Earnings growth is an important metric to consider when valuing a stock. What investors need to determine next is if the expected earnings growth, or the lack of it, is already built into the share price. Doing so will help them establish if the stock's future looks promising or ominous. Is Saia fairly valued compared to other companies? These 3 valuation measures might help you decide.

Is Saia Efficiently Re-investing Its Profits?

Saia doesn't pay any regular dividends to its shareholders, meaning that the company has been reinvesting all of its profits into the business. This is likely what's driving the high earnings growth number discussed above.

Summary

In total, we are pretty happy with Saia's performance. In particular, it's great to see that the company is investing heavily into its business and along with a high rate of return, that has resulted in a sizeable growth in its earnings. With that said, the latest industry analyst forecasts reveal that the company's earnings growth is expected to slow down. To know more about the company's future earnings growth forecasts take a look at this free report on analyst forecasts for the company to find out more.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. 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.