The Cec Environmental Protection Co.,Ltd (SZSE:300172) share price has fared very poorly over the last month, falling by a substantial 27%. Longer-term shareholders would now have taken a real hit with the stock declining 6.9% in the last year.

Even after such a large drop in price, Cec Environmental ProtectionLtd may still be sending bearish signals at the moment with its price-to-earnings (or "P/E") ratio of 35.1x, since almost half of all companies in China have P/E ratios under 26x and even P/E's lower than 16x are not unusual. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the elevated P/E.

For instance, Cec Environmental ProtectionLtd's receding earnings in recent times would have to be some food for thought. It might be that many expect the company to still outplay most other companies over the coming period, which has kept the P/E from collapsing. If not, then existing shareholders may be quite nervous about the viability of the share price.

How Is Cec Environmental ProtectionLtd's Growth Trending?

Cec Environmental ProtectionLtd's P/E ratio would be typical for a company that's expected to deliver solid growth, and importantly, perform better than the market.

Taking a look back first, the company's earnings per share growth last year wasn't something to get excited about as it posted a disappointing decline of 31%. The last three years don't look nice either as the company has shrunk EPS by 47% in aggregate. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

Comparing that to the market, which is predicted to deliver 42% growth in the next 12 months, the company's downward momentum based on recent medium-term earnings results is a sobering picture.

In light of this, it's alarming that Cec Environmental ProtectionLtd's P/E sits above the majority of other companies. 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. 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

Despite the recent share price weakness, Cec Environmental ProtectionLtd's P/E remains higher than most other companies. Using the price-to-earnings ratio alone to determine if you should sell your stock isn't sensible, however it can be a practical guide to the company's future prospects.

We've established that Cec Environmental ProtectionLtd 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.

There are also other vital risk factors to consider and we've discovered 3 warning signs for Cec Environmental ProtectionLtd (1 can't be ignored!) that you should be aware of before investing here.

Of course, you might also be able to find a better stock than Cec Environmental ProtectionLtd. So you may wish to see this free collection of other companies that have reasonable P/E ratios and have grown earnings strongly.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.
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.