Ideally, your overall portfolio should beat the market average. But the main game is to find enough winners to more than offset the losers So we wouldn't blame long term Suntak Technology Co.,Ltd. (SZSE:002815) shareholders for doubting their decision to hold, with the stock down 40% over a half decade. We also note that the stock has performed poorly over the last year, with the share price down 31%. The last week also saw the share price slip down another 8.0%.

Since Suntak TechnologyLtd has shed CN¥909m from its value in the past 7 days, let's see if the longer term decline has been driven by the business' economics.

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.

Looking back five years, both Suntak TechnologyLtd's share price and EPS declined; the latter at a rate of 13% per year. This fall in the EPS is worse than the 10% compound annual share price fall. So the market may previously have expected a drop, or else it expects the situation will improve.

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

Dive deeper into Suntak TechnologyLtd's key metrics by checking this interactive graph of Suntak TechnologyLtd'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 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. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. In the case of Suntak TechnologyLtd, it has a TSR of -33% for the last 5 years. That exceeds its share price return that we previously mentioned. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

While the broader market lost about 18% in the twelve months, Suntak TechnologyLtd shareholders did even worse, losing 30% (even including dividends). However, it could simply be that the share price has been impacted by broader market jitters. It might be worth keeping an eye on the fundamentals, in case there's a good opportunity. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 6% 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. For instance, we've identified 2 warning signs for Suntak TechnologyLtd that you should be aware of.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of companies we expect will grow earnings.

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

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team@simplywallst.com