Most readers would already be aware that SDI's (ASX:SDI) stock increased significantly by 6.9% over the past month. Given that stock prices are usually aligned with a company's financial performance in the long-term, we decided to study its financial indicators more closely to see if they had a hand to play in the recent price move. Specifically, we decided to study SDI's ROE in this article.

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. Simply put, it is used to assess the profitability of a company in relation to its equity capital.

Check out our latest analysis for SDI

How Is ROE Calculated?

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 SDI is:

11% = AU$8.9m ÷ AU$80m (Based on the trailing twelve months to June 2021).

The 'return' is the amount earned after tax over the last twelve months. Another way to think of that is that for every A$1 worth of equity, the company was able to earn A$0.11 in profit.

What Is The Relationship Between ROE And Earnings Growth?

So far, we've learned that ROE is a measure of a company's profitability. We now need to evaluate how much profit the company reinvests or "retains" for future growth which then gives us an idea about the growth potential of the company. 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.

SDI's Earnings Growth And 11% ROE

At first glance, SDI seems to have a decent ROE. Yet, the fact that the company's ROE is lower than the industry average of 16% does temper our expectations. On further research, we found that SDI's earnings over the past five years have been pretty flat. Not to forget, the company does have a decent ROE to begin with, just that it is lower than the industry average. So there might be other reasons for the flat earnings growth. For example, it could be that the company has a high payout ratio or the business has alloacted capital, for instance.

Next, on comparing with the industry net income growth, we found that SDI's reported growth was lower than the industry growth of 12% in the same period, which is not something we like to see.

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). By doing so, they will have an idea if the stock is headed into clear blue waters or if swampy waters await. Is SDI fairly valued compared to other companies? These 3 valuation measures might help you decide.