The Dongguan Development (Holdings) Co., Ltd. (SZSE:000828) share price has done very well over the last month, posting an excellent gain of 25%. Taking a wider view, although not as strong as the last month, the full year gain of 23% is also fairly reasonable.

Even after such a large jump in price, Dongguan Development (Holdings)'s price-to-earnings (or "P/E") ratio of 19.6x might still make it look like a buy right now compared to the market in China, where around half of the companies have P/E ratios above 30x and even P/E's above 58x are quite common. However, the P/E might be low for a reason and it requires further investigation to determine if it's justified.

For instance, Dongguan Development (Holdings)'s receding earnings in recent times would have to be some food for thought. It might be that many expect the disappointing earnings performance to continue or accelerate, which has repressed the P/E. If you like the company, you'd be hoping this isn't the case so that you could potentially pick up some stock while it's out of favour.

What Are Growth Metrics Telling Us About The Low P/E?

There's an inherent assumption that a company should underperform the market for P/E ratios like Dongguan Development (Holdings)'s to be considered reasonable.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 23%. The last three years don't look nice either as the company has shrunk EPS by 46% in aggregate. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

In contrast to the company, the rest of the market is expected to grow by 36% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

With this information, we are not surprised that Dongguan Development (Holdings) is trading at a P/E lower than the market. Nonetheless, there's no guarantee the P/E has reached a floor yet with earnings going in reverse. 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 Dongguan Development (Holdings)'s P/E?

Despite Dongguan Development (Holdings)'s shares building up a head of steam, its P/E still lags most other companies. 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.

We've established that Dongguan Development (Holdings) maintains its low P/E on the weakness of its sliding earnings over the medium-term, as expected. At this stage investors feel the potential for an improvement in earnings isn't great enough to justify a higher P/E ratio. 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.

And what about other risks? Every company has them, and we've spotted 3 warning signs for Dongguan Development (Holdings) (of which 2 are potentially serious!) you should know about.

Of course, you might find a fantastic investment by looking at a few good candidates. So take a peek at this free list of companies with a strong growth track record, trading on a low P/E.

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