Huaneng Lancang River Hydropower Inc.'s (SHSE:600025) price-to-earnings (or "P/E") ratio of 22.7x 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 32x and even P/E's above 61x are quite common. However, the P/E might be low for a reason and it requires further investigation to determine if it's justified.

Huaneng Lancang River Hydropower certainly has been doing a good job lately as its earnings growth has been positive while most other companies have been seeing their earnings go backwards. One possibility is that the P/E is low because investors think the company's earnings are going to fall away like everyone else's soon. 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.

What Are Growth Metrics Telling Us About The Low P/E?

There's an inherent assumption that a company should underperform the market for P/E ratios like Huaneng Lancang River Hydropower's to be considered reasonable.

If we review the last year of earnings growth, the company posted a terrific increase of 28%. The strong recent performance means it was also able to grow EPS by 38% in total over the last three years. So we can start by confirming that the company has done a great job of growing earnings over that time.

Turning to the outlook, the next three years should generate growth of 10% each year as estimated by the ten analysts watching the company. With the market predicted to deliver 19% growth per annum, the company is positioned for a weaker earnings result.

In light of this, it's understandable that Huaneng Lancang River Hydropower's P/E sits below the majority of other companies. It seems most investors are expecting to see limited future growth and are only willing to pay a reduced amount for the stock.

The Key Takeaway

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.

As we suspected, our examination of Huaneng Lancang River Hydropower's analyst forecasts revealed that its inferior earnings outlook is contributing to its low P/E. Right now shareholders are accepting the low P/E as they concede future earnings probably won't provide any pleasant surprises. It's hard to see the share price rising strongly in the near future under these circumstances.

Don't forget that there may be other risks. For instance, we've identified 2 warning signs for Huaneng Lancang River Hydropower (1 is concerning) 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.