The Zhejiang Langdi Group Co., Ltd. (SHSE:603726) share price has fared very poorly over the last month, falling by a substantial 27%. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 16% in that time.

After such a large drop in price, Zhejiang Langdi Group's price-to-earnings (or "P/E") ratio of 22.3x might 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 28x and even P/E's above 50x are quite common. However, the P/E might be low for a reason and it requires further investigation to determine if it's justified.

For example, consider that Zhejiang Langdi Group's financial performance has been poor lately as its earnings have been in decline. One possibility is that the P/E is low because investors think the company won't do enough to avoid underperforming the broader market in the near future. If you like the company, you'd be hoping this isn't the case so that you could potentially pick up some stock while it's out of favour.

Does Growth Match The Low P/E?

There's an inherent assumption that a company should underperform the market for P/E ratios like Zhejiang Langdi Group's to be considered reasonable.

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 17%. The last three years don't look nice either as the company has shrunk EPS by 8.0% in aggregate. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

In contrast to the company, the rest of the market is expected to grow by 41% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

In light of this, it's understandable that Zhejiang Langdi Group's P/E would sit below the majority of other companies. However, we think shrinking earnings are unlikely to lead to a stable P/E over the longer term, which could set up shareholders for future disappointment. Even just maintaining these prices could be difficult to achieve as recent earnings trends are already weighing down the shares.

What We Can Learn From Zhejiang Langdi Group's P/E?

Zhejiang Langdi Group's recently weak share price has pulled its P/E below most other companies. We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

As we suspected, our examination of Zhejiang Langdi Group revealed its shrinking earnings over the medium-term are contributing to its low P/E, given the market is set to grow. Right now shareholders are accepting the low P/E as they concede future earnings probably won't provide any pleasant surprises. If recent medium-term earnings trends continue, it's hard to see the share price moving strongly in either direction in the near future under these circumstances.

Don't forget that there may be other risks. For instance, we've identified 3 warning signs for Zhejiang Langdi Group (1 doesn't sit too well with us) you should be aware of.

Of course, you might also be able to find a better stock than Zhejiang Langdi Group. 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.