Most readers would already be aware that Rambus' (NASDAQ:RMBS) stock increased significantly by 53% 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. In this article, we decided to focus on Rambus' ROE.

ROE or return on equity is a useful tool to assess how effectively a company can generate returns on the investment it received from its shareholders. In other words, it is a profitability ratio which measures the rate of return on the capital provided by the company's shareholders.

We've found 21 US stocks that are forecast to pay a dividend yield of over 6% next year. See the full list for free.

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 Rambus is:

18% = US$207m ÷ US$1.2b (Based on the trailing twelve months to March 2025).

The 'return' is the income the business earned over the last year. Another way to think of that is that for every $1 worth of equity, the company was able to earn $0.18 in profit.

See our latest analysis for Rambus

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. 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. Assuming all else is equal, companies that have both a higher return on equity and higher profit retention are usually the ones that have a higher growth rate when compared to companies that don't have the same features.

Rambus' Earnings Growth And 18% ROE

To begin with, Rambus seems to have a respectable ROE. Especially when compared to the industry average of 12% the company's ROE looks pretty impressive. This probably laid the ground for Rambus' significant 66% net income growth seen over the past five years. We reckon that there could also be other factors at play here. 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 Rambus' 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 12%.

Earnings growth is a huge factor in stock valuation. 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. What is RMBS worth today? The intrinsic value infographic in our free research report helps visualize whether RMBS is currently mispriced by the market.

Is Rambus Using Its Retained Earnings Effectively?

Rambus 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

Overall, we are quite pleased with Rambus' 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. Having said that, the company's earnings growth is expected to slow down, as forecasted in the current analyst estimates. 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.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.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.