Zhongyeda Electric Co., Ltd. (SZSE:002441) shareholders that were waiting for something to happen have been dealt a blow with a 26% share price drop in the last month. The drop over the last 30 days has capped off a tough year for shareholders, with the share price down 42% in that time.

Even after such a large drop in price, Zhongyeda Electric may still be sending bullish signals at the moment with its price-to-earnings (or "P/E") ratio of 16.1x, since almost half of all companies in China have P/E ratios greater than 28x and even P/E's higher than 50x are not unusual. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the reduced P/E.

For example, consider that Zhongyeda Electric'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?

Zhongyeda Electric'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.

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 43%. This means it has also seen a slide in earnings over the longer-term as EPS is down 10% in total over the last three years. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

Weighing that medium-term earnings trajectory against the broader market's one-year forecast for expansion of 41% shows it's an unpleasant look.

In light of this, it's understandable that Zhongyeda Electric'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

The softening of Zhongyeda Electric's shares means its P/E is now sitting at a pretty low level. Typically, we'd caution against reading too much into price-to-earnings ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

As we suspected, our examination of Zhongyeda Electric revealed its shrinking earnings over the medium-term are contributing to its low P/E, given the market is set to grow. 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.

There are also other vital risk factors to consider before investing and we've discovered 2 warning signs for Zhongyeda Electric that you should be aware of.

Of course, you might also be able to find a better stock than Zhongyeda Electric. 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.