Zhejiang Xinchai Co.,Ltd (SZSE:301032) shareholders have had their patience rewarded with a 49% share price jump in the last month. While recent buyers may be laughing, long-term holders might not be as pleased since the recent gain only brings the stock back to where it started a year ago.

Even after such a large jump in price, you could still be forgiven for feeling indifferent about Zhejiang XinchaiLtd's P/E ratio of 36.5x, since the median price-to-earnings (or "P/E") ratio in China is also close to 34x. However, investors might be overlooking a clear opportunity or potential setback if there is no rational basis for the P/E.

Zhejiang XinchaiLtd certainly has been doing a great job lately as it's been growing earnings at a really rapid pace. It might be that many expect the strong earnings performance to wane, which has kept the P/E from rising. If that doesn't eventuate, then existing shareholders have reason to be feeling optimistic about the future direction of the share price.

Is There Some Growth For Zhejiang XinchaiLtd?

Zhejiang XinchaiLtd's P/E ratio would be typical for a company that's only expected to deliver moderate growth, and importantly, perform in line with the market.

Taking a look back first, we see that the company grew earnings per share by an impressive 306% last year. Despite this strong recent growth, it's still struggling to catch up as its three-year EPS frustratingly shrank by 50% 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 37% shows it's an unpleasant look.

With this information, we find it concerning that Zhejiang XinchaiLtd is trading at a fairly similar P/E to the market. Apparently many investors in the company are way less bearish than recent times would indicate and aren't willing to let go of their stock right now. There's a 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

Its shares have lifted substantially and now Zhejiang XinchaiLtd's P/E is also back up to the market median. It's argued the price-to-earnings ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

Our examination of Zhejiang XinchaiLtd revealed its shrinking earnings over the medium-term aren't impacting its P/E as much as we would have predicted, given the market is set to grow. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the moderate P/E lower. If recent medium-term earnings trends continue, it will place shareholders' investments at risk and potential investors in danger of paying an unnecessary premium.

You should always think about risks. Case in point, we've spotted 2 warning signs for Zhejiang XinchaiLtd you should be aware of, and 1 of them is concerning.

Of course, you might also be able to find a better stock than Zhejiang XinchaiLtd. So you may wish to see this free collection of other companies that have reasonable P/E ratios and have grown earnings strongly.

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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.