With its stock down 21% over the past three months, it is easy to disregard Penumbra (NYSE:PEN). We, however decided to study the company's financials to determine if they have got anything to do with the price decline. Fundamentals usually dictate market outcomes so it makes sense to study the company's financials. In this article, we decided to focus on Penumbra's ROE.

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. Put another way, it reveals the company's success at turning shareholder investments into profits.

View our latest analysis for Penumbra

How To Calculate Return On Equity?

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 Penumbra is:

2.7% = US$29m ÷ US$1.1b (Based on the trailing twelve months to June 2023).

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 $0.03 in profit.

What Is The Relationship Between ROE And Earnings Growth?

Thus far, we have learned that ROE measures how efficiently a company is generating its profits. Based on how much of its profits the company chooses to reinvest or "retain", we are then able to evaluate a company's future ability to generate profits. 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.

Penumbra's Earnings Growth And 2.7% ROE

As you can see, Penumbra's ROE looks pretty weak. Even compared to the average industry ROE of 9.5%, the company's ROE is quite dismal. Given the circumstances, the significant decline in net income by 28% seen by Penumbra over the last five years is not surprising. However, there could also be other factors causing the earnings to decline. For example, the business has allocated capital poorly, or that the company has a very high payout ratio.

That being said, we compared Penumbra's performance with the industry and were concerned when we found that while the company has shrunk its earnings, the industry has grown its earnings at a rate of 9.7% in the same 5-year period.

Earnings growth is an important metric to consider when valuing a stock. The investor should try to establish if the expected growth or decline in earnings, whichever the case may be, is priced in. By doing so, they will have an idea if the stock is headed into clear blue waters or if swampy waters await. Is PEN fairly valued? This infographic on the company's intrinsic value has everything you need to know.

Is Penumbra Efficiently Re-investing Its Profits?

Because Penumbra doesn't pay any dividends, we infer that it is retaining all of its profits, which is rather perplexing when you consider the fact that there is no earnings growth to show for it. So there could be some other explanations in that regard. For instance, the company's business may be deteriorating.

Conclusion

Overall, we have mixed feelings about Penumbra. Even though it appears to be retaining most of its profits, given the low ROE, investors may not be benefitting from all that reinvestment after all. The low earnings growth suggests our theory correct. Having said that, looking at current analyst estimates, we found that the company's earnings growth rate is expected to see a huge improvement. 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.