Sichuan Expressway Company Limited's (HKG:107) price-to-earnings (or "P/E") ratio of 5.9x might make it look like a buy right now compared to the market in Hong Kong, where around half of the companies have P/E ratios above 9x and even P/E's above 18x 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 Sichuan Expressway'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. However, if this doesn't eventuate then existing shareholders may be feeling optimistic about the future direction of the share price.

Does Growth Match The Low P/E?

Sichuan Expressway'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.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 13%. However, a few very strong years before that means that it was still able to grow EPS by an impressive 464% in total over the last three years. Accordingly, while they would have preferred to keep the run going, shareholders would probably welcome the medium-term rates of earnings growth.

Comparing that to the market, which is only predicted to deliver 24% growth in the next 12 months, the company's momentum is stronger based on recent medium-term annualised earnings results.

With this information, we find it odd that Sichuan Expressway is trading at a P/E lower than the market. It looks like most investors are not convinced the company can maintain its recent growth rates.

The Final Word

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.

Our examination of Sichuan Expressway revealed its three-year earnings trends aren't contributing to its P/E anywhere near as much as we would have predicted, given they look better than current market expectations. When we see strong earnings with faster-than-market growth, we assume potential risks are what might be placing significant pressure on the P/E ratio. At least price risks look to be very low if recent medium-term earnings trends continue, but investors seem to think future earnings could see a lot of volatility.

You should always think about risks. Case in point, we've spotted 2 warning signs for Sichuan Expressway you should be aware of, and 1 of them makes us a bit uncomfortable.

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.