Qingdao Copton Technology Company Limited (SHSE:603798) shares have had a really impressive month, gaining 30% after a shaky period beforehand. Looking back a bit further, it's encouraging to see the stock is up 45% in the last year.

Following the firm bounce in price, given close to half the companies in China have price-to-earnings ratios (or "P/E's") below 31x, you may consider Qingdao Copton Technology as a stock to avoid entirely with its 61.5x P/E ratio. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so lofty.

For example, consider that Qingdao Copton Technology's financial performance has been pretty ordinary lately as earnings growth is non-existent. It might be that many are expecting an improvement to the uninspiring earnings performance over the coming period, which has kept the P/E from collapsing. If not, then existing shareholders may be a little nervous about the viability of the share price.

How Is Qingdao Copton Technology's Growth Trending?

The only time you'd be truly comfortable seeing a P/E as steep as Qingdao Copton Technology's is when the company's growth is on track to outshine the market decidedly.

Taking a look back first, we see that there was hardly any earnings per share growth to speak of for the company over the past year. The lack of growth did nothing to help the company's aggregate three-year performance, which is an unsavory 45% drop in EPS. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

In contrast to the company, the rest of the market is expected to grow by 36% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

With this information, we find it concerning that Qingdao Copton Technology is trading at a P/E higher than the market. Apparently many investors in the company are way more bullish than recent times would indicate and aren't willing to let go of their stock at any price. Only the boldest would assume these prices are sustainable as a continuation of recent earnings trends is likely to weigh heavily on the share price eventually.

The Final Word

Qingdao Copton Technology's P/E is flying high just like its stock has during the last month. While the price-to-earnings ratio shouldn't be the defining factor in whether you buy a stock or not, it's quite a capable barometer of earnings expectations.

We've established that Qingdao Copton Technology currently trades on a much higher than expected P/E since its recent earnings have been in decline over the medium-term. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the high P/E lower. If recent medium-term earnings trends continue, it will place shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

You should always think about risks. Case in point, we've spotted 2 warning signs for Qingdao Copton Technology you should be aware of.

If P/E ratios interest you, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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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.