As Kainos Group (LON:KNOS) rises 5.9% this past week, investors may now be noticing the company's three-year earnings growth

Kainos Group plc (LON:KNOS) shareholders should be happy to see the share price up 12% in the last month. But that doesn't change the fact that the returns over the last three years have been less than pleasing. After all, the share price is down 34% in the last three years, significantly under-performing the market.

On a more encouraging note the company has added UK£51m to its market cap in just the last 7 days, so let's see if we can determine what's driven the three-year loss for shareholders.

We've discovered 1 warning sign about Kainos Group. View them for free.

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. 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 the unfortunate three years of share price decline, Kainos Group actually saw its earnings per share (EPS) improve by 8.8% per year. This is quite a puzzle, and suggests there might be something temporarily buoying the share price. Alternatively, growth expectations may have been unreasonable in the past.

Since the change in EPS doesn't seem to correlate with the change in share price, it's worth taking a look at other metrics.

We note that, in three years, revenue has actually grown at a 11% annual rate, so that doesn't seem to be a reason to sell shares. This analysis is just perfunctory, but it might be worth researching Kainos Group more closely, as sometimes stocks fall unfairly. This could present an opportunity.

The image below shows how earnings and revenue have tracked over time (if you click on the image you can see greater detail).

It's probably worth noting that the CEO is paid less than the median at similar sized companies. It's always worth keeping an eye on CEO pay, but a more important question is whether the company will grow earnings throughout the years. You can see what analysts are predicting for Kainos Group in this interactive graph of future profit estimates.

What About Dividends?

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. Whereas the share price return only reflects the change in the share price, the TSR includes the value of dividends (assuming they were reinvested) and the benefit of any discounted capital raising or spin-off. Arguably, the TSR gives a more comprehensive picture of the return generated by a stock. In the case of Kainos Group, it has a TSR of -29% for the last 3 years. That exceeds its share price return that we previously mentioned. And there's no prize for guessing that the dividend payments largely explain the divergence!

A Different Perspective

While the broader market gained around 5.8% in the last year, Kainos Group shareholders lost 22% (even including dividends). 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 1.6% per year over half a decade. It could be that the recent sell-off is an opportunity, so it may be worth checking the fundamental data for signs of a long term growth trend. It's always interesting to track share price performance over the longer term. But to understand Kainos Group better, we need to consider many other factors. To that end, you should be aware of the 1 warning sign we've spotted with Kainos Group .

Of course Kainos Group 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 British 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.