Investing in Mercury NZ (NZSE:MCY) five years ago would have delivered you a 67% gain

Stock pickers are generally looking for stocks that will outperform the broader market. And while active stock picking involves risks (and requires diversification) it can also provide excess returns. For example, long term Mercury NZ Limited (NZSE:MCY) shareholders have enjoyed a 37% share price rise over the last half decade, well in excess of the market decline of around 4.1% (not including dividends).

Now it's worth having a look at the company's fundamentals too, because that will help us determine if the long term shareholder return has matched the performance of the underlying business.

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In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

During five years of share price growth, Mercury NZ actually saw its EPS drop 32% per year.

This means it's unlikely the market is judging the company based on earnings growth. Because earnings per share don't seem to match up with the share price, we'll take a look at other metrics instead.

On the other hand, Mercury NZ's revenue is growing nicely, at a compound rate of 16% over the last five years. In that case, the company may be sacrificing current earnings per share to drive growth.

The company's revenue and earnings (over time) are depicted in the image below (click to see the exact numbers).

If you are thinking of buying or selling Mercury NZ stock, you should check out this FREE detailed report on its balance sheet.

What About Dividends?

It is important to consider the total shareholder return, as well as the share price return, for any given stock. The TSR is a return calculation that accounts for the value of cash dividends (assuming that any dividend received was reinvested) and the calculated value of any discounted capital raisings and spin-offs. It's fair to say that the TSR gives a more complete picture for stocks that pay a dividend. We note that for Mercury NZ the TSR over the last 5 years was 67%, which is better than the share price return mentioned above. And there's no prize for guessing that the dividend payments largely explain the divergence!

A Different Perspective

Investors in Mercury NZ had a tough year, with a total loss of 2.7% (including dividends), against a market gain of about 11%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. On the bright side, long term shareholders have made money, with a gain of 11% per year over half a decade. If the fundamental data continues to indicate long term sustainable growth, the current sell-off could be an opportunity worth considering. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. Consider risks, for instance. Every company has them, and we've spotted 2 warning signs for Mercury NZ you should know about.

Of course Mercury NZ may not be the best stock to buy. So you may wish to see this free collection of growth stocks.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on New Zealander exchanges.

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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.