Shenzhen KSTAR Science and Technology Co., Ltd. (SZSE:002518) shareholders might understandably be very concerned that the share price has dropped 39% in the last quarter. But in stark contrast, the returns over the last half decade have impressed. In fact, the share price is 108% higher today. So while it's never fun to see a share price fall, it's important to look at a longer time horizon. Ultimately business performance will determine whether the stock price continues the positive long term trend. Unfortunately not all shareholders will have held it for the long term, so spare a thought for those caught in the 68% decline over the last twelve months.

Although Shenzhen KSTAR Science and Technology has shed CN¥2.7b from its market cap this week, let's take a look at its longer term fundamental trends and see if they've driven returns.

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 five years of share price growth, Shenzhen KSTAR Science and Technology achieved compound earnings per share (EPS) growth of 21% per year. This EPS growth is higher than the 16% average annual increase in the share price. So it seems the market isn't so enthusiastic about the stock these days. This cautious sentiment is reflected in its (fairly low) P/E ratio of 11.30.

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

We know that Shenzhen KSTAR Science and Technology has improved its bottom line over the last three years, but what does the future have in store? You can see how its balance sheet has strengthened (or weakened) over time in this free interactive graphic.

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 Shenzhen KSTAR Science and Technology, it has a TSR of 124% 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

We regret to report that Shenzhen KSTAR Science and Technology shareholders are down 68% for the year (even including dividends). Unfortunately, that's worse than the broader market decline of 28%. 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. On the bright side, long term shareholders have made money, with a gain of 17% 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. 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 Shenzhen KSTAR Science and Technology you should know about.

For those who like to find winning investments this free list 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 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.