The three-year shareholder returns and company earnings persist lower as Spark New Zealand (NZSE:SPK) stock falls a further 6.5% in past week

In order to justify the effort of selecting individual stocks, it's worth striving to beat the returns from a market index fund. But its virtually certain that sometimes you will buy stocks that fall short of the market average returns. Unfortunately, that's been the case for longer term Spark New Zealand Limited (NZSE:SPK) shareholders, since the share price is down 56% in the last three years, falling well short of the market return of around 22%. Shareholders have had an even rougher run lately, with the share price down 12% in the last 90 days.

With the stock having lost 6.5% in the past week, it's worth taking a look at business performance and seeing if there's any red flags.

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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. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

During the three years that the share price fell, Spark New Zealand's earnings per share (EPS) dropped by 15% each year. This reduction in EPS is slower than the 24% annual reduction in the share price. So it's likely that the EPS decline has disappointed the market, leaving investors hesitant to buy.

You can see below how EPS has changed over time (discover the exact values by clicking on the image).NZSE:SPK Earnings Per Share Growth November 8th 2025

We consider it positive that insiders have made significant purchases in the last year. Even so, future earnings will be far more important to whether current shareholders make money. It might be well worthwhile taking a look at our freereport on Spark New Zealand's earnings, revenue and cash flow.

What About Dividends?

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. The TSR incorporates the value of any spin-offs or discounted capital raisings, along with any dividends, based on the assumption that the dividends are reinvested. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. As it happens, Spark New Zealand's TSR for the last 3 years was -42%, which exceeds the share price return mentioned earlier. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

Spark New Zealand shareholders are down 15% for the year (even including dividends), but the market itself is up 9.5%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 5% over the last half decade. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. It's always interesting to track share price performance over the longer term. But to understand Spark New Zealand better, we need to consider many other factors. For instance, we've identified 2 warning signs for Spark New Zealand (1 can't be ignored) that you should be aware of.

Story Continues

Spark New Zealand is not the only stock that insiders are buying. For those who like to find lesser know companies this freelist of growing companies with recent insider purchasing, could be just the ticket.

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.

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