As an investor its worth striving to ensure your overall portfolio beats the market average. But if you try your hand at stock picking, your risk returning less than the market. We regret to report that long term SinoDaan Co., Ltd. (SZSE:300635) shareholders have had that experience, with the share price dropping 45% in three years, versus a market decline of about 5.5%. The last week also saw the share price slip down another 17%.

After losing 17% this past week, it's worth investigating the company's fundamentals to see what we can infer from past performance.

View our latest analysis for SinoDaan

While the efficient markets hypothesis continues to be taught by some, it has been proven that markets are over-reactive dynamic systems, and investors are not always rational. 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.

Over the three years that the share price declined, SinoDaan's earnings per share (EPS) dropped significantly, falling to a loss. Since the company has fallen to a loss making position, it's hard to compare the change in EPS with the share price change. But it's safe to say we'd generally expect the share price to be lower as a result!

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

This free interactive report on SinoDaan's earnings, revenue and cash flow is a great place to start, if you want to investigate the stock further.

A Different Perspective

We regret to report that SinoDaan shareholders are down 11% for the year. Unfortunately, that's worse than the broader market decline of 1.2%. 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 3% per year over five years. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. While it is well worth considering the different impacts that market conditions can have on the share price, there are other factors that are even more important. Consider for instance, the ever-present spectre of investment risk. We've identified 2 warning signs with SinoDaan (at least 1 which is a bit unpleasant) , and understanding them should be part of your investment process.

If you are like me, then you will not want to miss this free list of growing companies that insiders are buying.

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.