Many investors define successful investing as beating the market average over the long term. But in any portfolio, there are likely to be some stocks that fall short of that benchmark. Unfortunately, that's been the case for longer term Grinm Advanced Materials Co., Ltd. (SHSE:600206) shareholders, since the share price is down 41% in the last three years, falling well short of the market decline of around 25%. The more recent news is of little comfort, with the share price down 26% in a year. On the other hand the share price has bounced 5.7% over the last week.

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.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. 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 the three years that the share price fell, Grinm Advanced Materials' earnings per share (EPS) dropped by 4.2% each year. The share price decline of 16% is actually steeper than the EPS slippage. So it's likely that the EPS decline has disappointed the market, leaving investors hesitant to buy.

The company's earnings per share (over time) is depicted in the image below (click to see the exact numbers).

We know that Grinm Advanced Materials has improved its bottom line lately, but is it going to grow revenue? Check if analysts think Grinm Advanced Materials will grow revenue in the future.

A Different Perspective

We regret to report that Grinm Advanced Materials shareholders are down 25% for the year (even including dividends). Unfortunately, that's worse than the broader market decline of 12%. 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. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 3% 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. Take risks, for example - Grinm Advanced Materials has 1 warning sign we think you should be aware of.

If you like to buy stocks alongside management, then you might just love this free list of companies. (Hint: many of them are unnoticed AND have attractive valuation).

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.