Sanmina (NASDAQ:SANM) has had a great run on the share market with its stock up by a significant 11% over the last three months. Since the market usually pay for a company's long-term fundamentals, we decided to study the company's key performance indicators to see if they could be influencing the market. Particularly, we will be paying attention to Sanmina'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. In short, ROE shows the profit each dollar generates with respect to its shareholder investments.

See our latest analysis for Sanmina

How To Calculate Return On Equity?

ROE 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 Sanmina is:

16% = US$286m ÷ US$1.8b (Based on the trailing twelve months to April 2022).

The 'return' refers to a company's earnings over the last year. Another way to think of that is that for every $1 worth of equity, the company was able to earn $0.16 in profit.

What Has ROE Got To Do With 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. Generally speaking, other things being equal, firms with a high return on equity and profit retention, have a higher growth rate than firms that don't share these attributes.

Sanmina's Earnings Growth And 16% ROE

To start with, Sanmina's ROE looks acceptable. On comparing with the average industry ROE of 13% the company's ROE looks pretty remarkable. This probably laid the ground for Sanmina's significant 28% net income growth seen over the past five years. However, there could also be other causes behind this growth. For instance, the company has a low payout ratio or is being managed efficiently.

As a next step, we compared Sanmina'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 15%.

Earnings growth is an important metric to consider when valuing a stock. It's important for an investor to know whether the market has priced in the company's expected earnings growth (or decline). This then helps them determine if the stock is placed for a bright or bleak future. One good indicator of expected earnings growth is the P/E ratio which determines the price the market is willing to pay for a stock based on its earnings prospects. So, you may want to check if Sanmina is trading on a high P/E or a low P/E, relative to its industry.

Is Sanmina Using Its Retained Earnings Effectively?

Sanmina doesn't pay any dividend 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

Overall, we are quite pleased with Sanmina's performance. Specifically, we like that the company is reinvesting a huge chunk of its profits at a high rate of return. This of course has caused the company to see substantial growth in its earnings. That being so, according to the latest industry analyst forecasts, the company's earnings are expected to shrink in the future. Are these analysts expectations based on the broad expectations for the industry, or on the company's fundamentals? Click here to be taken to our analyst's forecasts page for the company.

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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.