The CN Logistics International Holdings Limited (HKG:2130) share price has fared very poorly over the last month, falling by a substantial 46%. For any long-term shareholders, the last month ends a year to forget by locking in a 61% share price decline.

Although its price has dipped substantially, given close to half the companies in Hong Kong have price-to-earnings ratios (or "P/E's") below 9x, you may still consider CN Logistics International Holdings as a stock to avoid entirely with its 19.5x P/E ratio. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so lofty.

For example, consider that CN Logistics International Holdings' financial performance has been poor lately as its earnings have been in decline. One possibility is that the P/E is high because investors think the company will still do enough to outperform the broader market in the near future. If not, then existing shareholders may be quite nervous about the viability of the share price.

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

There's an inherent assumption that a company should far outperform the market for P/E ratios like CN Logistics International Holdings' to be considered reasonable.

Retrospectively, the last year delivered a frustrating 49% decrease to the company's bottom line. As a result, earnings from three years ago have also fallen 61% overall. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

In contrast to the company, the rest of the market is expected to grow by 20% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

With this information, we find it concerning that CN Logistics International Holdings is trading at a P/E higher than the market. 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. Only the boldest would assume these prices are sustainable as a continuation of recent earnings trends is likely to weigh heavily on the share price eventually.

The Final Word

Even after such a strong price drop, CN Logistics International Holdings' P/E still exceeds the rest of the market significantly. 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.

Our examination of CN Logistics International Holdings revealed its shrinking earnings over the medium-term aren't impacting its high P/E anywhere near as much as we would have predicted, given the market is set to grow. Right now we are increasingly uncomfortable with the high P/E as this earnings performance is highly unlikely to support such positive sentiment for long. Unless the recent medium-term conditions improve markedly, it's very challenging to accept these prices as being reasonable.

Before you settle on your opinion, we've discovered 2 warning signs for CN Logistics International Holdings that 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.