Shanghai CEO Environmental Protection Technology Co., Ltd (SHSE:688335) shareholders are no doubt pleased to see that the share price has bounced 33% in the last month, although it is still struggling to make up recently lost ground. Unfortunately, the gains of the last month did little to right the losses of the last year with the stock still down 31% over that time.

In spite of the firm bounce in price, Shanghai CEO Environmental Protection Technology's price-to-earnings (or "P/E") ratio of 16.5x might still make it look like a buy right now compared to the market in China, where around half of the companies have P/E ratios above 32x and even P/E's above 58x are quite common. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the reduced P/E.

Recent times haven't been advantageous for Shanghai CEO Environmental Protection Technology as its earnings have been falling quicker than most other companies. It seems that many are expecting the dismal earnings performance to persist, which has repressed the P/E. If you still like the company, you'd want its earnings trajectory to turn around before making any decisions. Or at the very least, you'd be hoping the earnings slide doesn't get any worse if your plan is to pick up some stock while it's out of favour.

Does Growth Match The Low P/E?

Shanghai CEO Environmental Protection Technology's P/E ratio would be typical for a company that's only expected to deliver limited growth, and importantly, perform worse than the market.

Retrospectively, the last year delivered a frustrating 12% decrease to the company's bottom line. Regardless, EPS has managed to lift by a handy 25% in aggregate from three years ago, thanks to the earlier period of growth. Although it's been a bumpy ride, it's still fair to say the earnings growth recently has been mostly respectable for the company.

Shifting to the future, estimates from the sole analyst covering the company suggest earnings growth is heading into negative territory, declining 25% over the next year. That's not great when the rest of the market is expected to grow by 40%.

In light of this, it's understandable that Shanghai CEO Environmental Protection Technology's P/E would sit below the majority of other companies. Nonetheless, there's no guarantee the P/E has reached a floor yet with earnings going in reverse. There's potential for the P/E to fall to even lower levels if the company doesn't improve its profitability.

The Key Takeaway

Shanghai CEO Environmental Protection Technology's stock might have been given a solid boost, but its P/E certainly hasn't reached any great heights. 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 Shanghai CEO Environmental Protection Technology maintains its low P/E on the weakness of its forecast for sliding earnings, as expected. At this stage investors feel the potential for an improvement in earnings isn't great enough to justify a higher P/E ratio. It's hard to see the share price rising strongly in the near future under these circumstances.

Before you settle on your opinion, we've discovered 2 warning signs for Shanghai CEO Environmental Protection Technology (1 can't be ignored!) that you should be aware of.

You might be able to find a better investment than Shanghai CEO Environmental Protection Technology. If you want a selection of possible candidates, check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.