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# Taking A Look At NorthWestern Corporation’s (NYSE:NWE) ROE

One of the best investments we can make is in our own knowledge and skill set. With that in mind, this article will work through how we can use Return On Equity (ROE) to better understand a business. We’ll use ROE to examine NorthWestern Corporation (NYSE:NWE), by way of a worked example.

Our data shows NorthWestern has a return on equity of 9.8% for the last year. That means that for every \$1 worth of shareholders’ equity, it generated \$0.098 in profit.

### How Do You Calculate ROE?

The formula for return on equity is:

Return on Equity = Net Profit ÷ Shareholders’ Equity

Or for NorthWestern:

9.8% = US\$187m ÷ US\$1.9b (Based on the trailing twelve months to June 2018.)

Most know that net profit is the total earnings after all expenses, but the concept of shareholders’ equity is a little more complicated. It is all the money paid into the company from shareholders, plus any earnings retained. The easiest way to calculate shareholders’ equity is to subtract the company’s total liabilities from the total assets.

### What Does Return On Equity Mean?

ROE looks at the amount a company earns relative to the money it has kept within the business. The ‘return’ is the amount earned after tax over the last twelve months. The higher the ROE, the more profit the company is making. So, as a general rule, a high ROE is a good thing. Clearly, then, one can use ROE to compare different companies.

### Does NorthWestern Have A Good ROE?

Arguably the easiest way to assess company’s ROE is to compare it with the average in its industry. Importantly, this is far from a perfect measure, because companies differ significantly within the same industry classification. The image below shows that NorthWestern has an ROE that is roughly in line with the integrated utilities industry average (11%).

That isn’t amazing, but it is respectable. Generally it will take a while for decisions made by leadership to impact the ROE. So I like to check the tenure of the board and CEO, before reaching any conclusions.

### How Does Debt Impact Return On Equity?

Virtually all companies need money to invest in the business, to grow profits. That cash can come from retained earnings, issuing new shares (equity), or debt. In the first and second cases, the ROE will reflect this use of cash for investment in the business. In the latter case, the debt used for growth will improve returns, but won’t affect the total equity. That will make the ROE look better than if no debt was used.

### NorthWestern’s Debt And Its 9.8% ROE

It’s worth noting the significant use of debt by NorthWestern, leading to its debt to equity ratio of 1.07. While the ROE isn’t too bad, it would probably be a lot lower if the company was forced to reduce debt. Debt does bring some extra risk, so it’s only really worthwhile when a company generates some decent returns from it.

### In Summary

Return on equity is useful for comparing the quality of different businesses. Companies that can achieve high returns on equity without too much debt are generally of good quality. All else being equal, a higher ROE is better.

Having said that, while ROE is a useful indicator of business quality, you’ll have to look at a whole range of factors to determine the right price to buy a stock. Profit growth rates, versus the expectations reflected in the price of the stock, are a particularly important to consider. So you might want to take a peek at this data-rich interactive graph of forecasts for the company.

If you would prefer check out another company — one with potentially superior financials — then do not miss this free list of interesting companies, that have HIGH return on equity and low debt.

To help readers see past the short term volatility of the financial market, we aim to bring you a long-term focused research analysis purely driven by fundamental data. Note that our analysis does not factor in the latest price-sensitive company announcements.

The author is an independent contributor and at the time of publication had no position in the stocks mentioned. For errors that warrant correction please contact the editor at editorial-team@simplywallst.com.