The Qingdao Copton Technology Company Limited (SHSE:603798) share price has fared very poorly over the last month, falling by a substantial 26%. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 23% in that time.

Even after such a large drop in price, Qingdao Copton Technology's price-to-earnings (or "P/E") ratio of 39x might still make it look like a sell right now compared to the market in China, where around half of the companies have P/E ratios below 26x and even P/E's below 16x are quite common. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's as high as it is.

We'd have to say that with no tangible growth over the last year, Qingdao Copton Technology's earnings have been unimpressive. One possibility is that the P/E is high because investors think the benign earnings growth will improve to outperform the broader market in the near future. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

Does Growth Match The High P/E?

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

If we review the last year of earnings, the company posted a result that saw barely any deviation from a year ago. The lack of growth did nothing to help the company's aggregate three-year performance, which is an unsavory 45% drop in EPS. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

Weighing that medium-term earnings trajectory against the broader market's one-year forecast for expansion of 41% shows it's an unpleasant look.

In light of this, it's alarming that Qingdao Copton Technology's P/E sits above the majority of other companies. It seems most investors are ignoring the recent poor growth rate and are hoping for a turnaround in the company's business prospects. There's a very good chance existing shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the recent negative growth rates.

The Key Takeaway

There's still some solid strength behind Qingdao Copton Technology's P/E, if not its share price lately. Generally, our preference is to limit the use of the price-to-earnings ratio to establishing what the market thinks about the overall health of a company.

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. Right now we are increasingly uncomfortable with the high P/E as this earnings performance is highly unlikely to support such positive sentiment for long. 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.

Plus, you should also learn about these 3 warning signs we've spotted with Qingdao Copton Technology (including 1 which shouldn't be ignored).

If you're unsure about the strength of Qingdao Copton Technology's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.