The truth is that if you invest for long enough, you're going to end up with some losing stocks. But the long term shareholders of Tianjin Jingwei Huikai Optoelectronic Co., Ltd. (SZSE:300120) have had an unfortunate run in the last three years. Regrettably, they have had to cope with a 53% drop in the share price over that period. The more recent news is of little comfort, with the share price down 52% in a year. The falls have accelerated recently, with the share price down 39% in the last three months.

After losing 24% this past week, it's worth investigating the company's fundamentals to see what we can infer from past performance.

There is no denying that markets are sometimes efficient, but prices do not always reflect underlying business performance. 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.

Tianjin Jingwei Huikai Optoelectronic saw its EPS decline at a compound rate of 42% per year, over the last three years. In comparison the 22% compound annual share price decline isn't as bad as the EPS drop-off. So the market may not be too worried about the EPS figure, at the moment -- or it may have previously priced some of the drop in. With a P/E ratio of 71.98, it's fair to say the market sees a brighter future for the business.

You can see below how EPS has changed over time (discover the exact values by clicking on the image).

Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here.

A Different Perspective

We regret to report that Tianjin Jingwei Huikai Optoelectronic shareholders are down 51% for the year (even including dividends). Unfortunately, that's worse than the broader market decline of 20%. 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. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 8% per year over five years. 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. To that end, you should learn about the 4 warning signs we've spotted with Tianjin Jingwei Huikai Optoelectronic (including 1 which is potentially serious) .

If you like to buy stocks alongside management, then you might just love this free list of companies. (Hint: insiders have been buying them).

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.