China Automotive Systems, Inc. (NASDAQ:CAAS) shareholders have had their patience rewarded with a 30% share price jump in the last month. Not all shareholders will be feeling jubilant, since the share price is still down a very disappointing 13% in the last twelve months.

Even after such a large jump in price, given about half the companies in the United States have price-to-earnings ratios (or "P/E's") above 19x, you may still consider China Automotive Systems as a highly attractive investment with its 3.6x P/E ratio. However, the P/E might be quite low for a reason and it requires further investigation to determine if it's justified.

Recent times have been quite advantageous for China Automotive Systems as its earnings have been rising very briskly. It might be that many expect the strong earnings performance to degrade substantially, which has repressed the P/E. If that doesn't eventuate, then existing shareholders have reason to be quite optimistic about the future direction of the share price.

How Is China Automotive Systems' Growth Trending?

The only time you'd be truly comfortable seeing a P/E as depressed as China Automotive Systems' is when the company's growth is on track to lag the market decidedly.

Taking a look back first, we see that the company grew earnings per share by an impressive 41% last year. Although, its longer-term performance hasn't been as strong with three-year EPS growth being relatively non-existent overall. Accordingly, shareholders probably wouldn't have been overly satisfied with the unstable medium-term growth rates.

This is in contrast to the rest of the market, which is expected to grow by 13% over the next year, materially higher than the company's recent medium-term annualised growth rates.

With this information, we can see why China Automotive Systems is trading at a P/E lower than the market. It seems most investors are expecting to see the recent limited growth rates continue into the future and are only willing to pay a reduced amount for the stock.

The Final Word

Shares in China Automotive Systems are going to need a lot more upward momentum to get the company's P/E out of its slump. 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.

As we suspected, our examination of China Automotive Systems revealed its three-year earnings trends are contributing to its low P/E, given they look worse than current market expectations. At this stage investors feel the potential for an improvement in earnings isn't great enough to justify a higher P/E ratio. Unless the recent medium-term conditions improve, they will continue to form a barrier for the share price around these levels.

The company's balance sheet is another key area for risk analysis. Take a look at our free balance sheet analysis for China Automotive Systems with six simple checks on some of these key factors.

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.

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