China West Construction Group Co., Ltd (SZSE:002302) shareholders would be excited to see that the share price has had a great month, posting a 32% gain and recovering from prior weakness. Not all shareholders will be feeling jubilant, since the share price is still down a very disappointing 12% in the last twelve months.

Although its price has surged higher, China West Construction Group may still be sending bullish signals at the moment with its price-to-earnings (or "P/E") ratio of 16.9x, since almost half of all companies in China have P/E ratios greater than 27x and even P/E's higher than 51x 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.

The earnings growth achieved at China West Construction Group over the last year would be more than acceptable for most companies. It might be that many expect the respectable earnings performance to degrade substantially, which has repressed the P/E. If that doesn't eventuate, then existing shareholders have reason to be optimistic about the future direction of the share price.

Is There Any Growth For China West Construction Group?

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

Taking a look back first, we see that the company grew earnings per share by an impressive 30% last year. Still, incredibly EPS has fallen 43% in total from three years ago, which is quite disappointing. 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 38% shows it's an unpleasant look.

With this information, we are not surprised that China West Construction Group is trading at a P/E lower than the market. 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.

What We Can Learn From China West Construction Group's P/E?

China West Construction Group's stock might have been given a solid boost, but its P/E certainly hasn't reached any great heights. 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 China West Construction Group 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. Unless the recent medium-term conditions improve, they will continue to form a barrier for the share price around these levels.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 1 warning sign with China West Construction Group, and understanding should be part of your investment process.

You might be able to find a better investment than China West Construction Group. If you want a selection of possible candidates, check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.