When close to half the companies in China have price-to-earnings ratios (or "P/E's") below 29x, you may consider Jinzhou Port Co., Ltd. (SHSE:600190) as a stock to avoid entirely with its 47.1x P/E ratio. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.

With earnings growth that's exceedingly strong of late, Jinzhou Port has been doing very well. The P/E is probably high because investors think this strong earnings growth will be enough to outperform the broader market in the near future. If not, then existing shareholders might be a little nervous about the viability of the share price.

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

The only time you'd be truly comfortable seeing a P/E as steep as Jinzhou Port's is when the company's growth is on track to outshine the market decidedly.

Retrospectively, the last year delivered an exceptional 47% gain to the company's bottom line. Despite this strong recent growth, it's still struggling to catch up as its three-year EPS frustratingly shrank by 45% overall. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

Weighing that medium-term earnings trajectory against the broader market's one-year forecast for expansion of 36% shows it's an unpleasant look.

With this information, we find it concerning that Jinzhou Port 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. There's a very good chance existing shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the recent negative 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.

We've established that Jinzhou Port currently trades on a much higher than expected P/E since its recent earnings have been in decline over the medium-term. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the high P/E lower. Unless the recent medium-term conditions improve markedly, it's very challenging to accept these prices as being reasonable.

Having said that, be aware Jinzhou Port is showing 3 warning signs in our investment analysis, and 2 of those are concerning.

If you're unsure about the strength of Jinzhou Port's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.