It's not possible to invest over long periods without making some bad investments. But really bad investments should be rare. So spare a thought for the long term shareholders of Seazen Group Limited (HKG:1030); the share price is down a whopping 86% in the last three years. That would certainly shake our confidence in the decision to own the stock. And more recent buyers are having a tough time too, with a drop of 63% in the last year. Furthermore, it's down 23% in about a quarter. That's not much fun for holders. While a drop like that is definitely a body blow, money isn't as important as health and happiness.

Although the past week has been more reassuring for shareholders, they're still in the red over the last three years, so let's see if the underlying business has been responsible for the decline.

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 flawed but reasonable way to assess how sentiment around a company has changed is to compare the earnings per share (EPS) with the share price.

Over the three years that the share price declined, Seazen Group's earnings per share (EPS) dropped significantly, falling to a loss. This was, in part, due to extraordinary items impacting earnings. Since the company has fallen to a loss making position, it's hard to compare the change in EPS with the share price change. However, we can say we'd expect to see a falling share price in this scenario.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

It might be well worthwhile taking a look at our free report on Seazen Group's earnings, revenue and cash flow.

A Different Perspective

We regret to report that Seazen Group shareholders are down 63% for the year. Unfortunately, that's worse than the broader market decline of 13%. Having said that, it's inevitable that some stocks will be oversold in a falling market. The key is to keep your eyes on the fundamental developments. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 13% over the last half decade. Generally speaking long term share price weakness can be a bad sign, though contrarian investors might want to research the stock in hope of a turnaround. 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. Case in point: We've spotted 2 warning signs for Seazen Group you should be aware of, and 1 of them is a bit unpleasant.

Of course Seazen 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 Hong Kong 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.