When close to half the companies in China have price-to-earnings ratios (or "P/E's") above 38x, you may consider Gemac Engineering Machinery Co., Ltd. (SZSE:301048) as an attractive investment with its 29.5x P/E ratio. However, the P/E might be low for a reason and it requires further investigation to determine if it's justified.

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For instance, Gemac Engineering Machinery's receding earnings in recent times would have to be some food for thought. 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.

Is There Any Growth For Gemac Engineering Machinery?

The only time you'd be truly comfortable seeing a P/E as low as Gemac Engineering Machinery's is when the company's growth is on track to lag the market.

Taking a look back first, the company's earnings per share growth last year wasn't something to get excited about as it posted a disappointing decline of 35%. This means it has also seen a slide in earnings over the longer-term as EPS is down 34% in total over the last three years. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

Weighing that medium-term earnings trajectory against the broader market's one-year forecast for expansion of 34% shows it's an unpleasant look.

In light of this, it's understandable that Gemac Engineering Machinery's P/E would sit below the majority of other companies. However, we think shrinking earnings are unlikely to lead to a stable P/E over the longer term, which could set up shareholders for future disappointment. Even just maintaining these prices could be difficult to achieve as recent earnings trends are already weighing down the shares.

The Final Word

Generally, our preference is to limit the use of the price-to-earnings ratio to establishing what the market thinks about the overall health of a company.

We've established that Gemac Engineering Machinery maintains its low P/E on the weakness of its sliding earnings over the medium-term, as expected. Right now shareholders are accepting the low P/E as they concede future earnings probably won't provide any pleasant surprises. If recent medium-term earnings trends continue, it's hard to see the share price moving strongly in either direction in the near future under these circumstances.

You always need to take note of risks, for example - Gemac Engineering Machinery has 2 warning signs we think 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.