The Kangda International Environmental Company Limited (HKG:6136) share price has fared very poorly over the last month, falling by a substantial 39%. For any long-term shareholders, the last month ends a year to forget by locking in a 61% share price decline.

In spite of the heavy fall in price, Kangda International Environmental's price-to-earnings (or "P/E") ratio of 3.9x might still make it look like a strong buy right now compared to the market in Hong Kong, where around half of the companies have P/E ratios above 10x and even P/E's above 20x are quite common. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so limited.

For instance, Kangda International Environmental'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. However, if this doesn't eventuate then existing shareholders may be feeling optimistic about the future direction of the share price.

Check out our latest analysis for Kangda International Environmental

How Is Kangda International Environmental's Growth Trending?

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

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 69%. The last three years don't look nice either as the company has shrunk EPS by 74% in aggregate. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

In contrast to the company, the rest of the market is expected to grow by 25% 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 Kangda International Environmental 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.

The Bottom Line On Kangda International Environmental's P/E

Having almost fallen off a cliff, Kangda International Environmental's share price has pulled its P/E way down as well. We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

We've established that Kangda International Environmental 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 should always think about risks. Case in point, we've spotted 5 warning signs for Kangda International Environmental you should be aware of, and 2 of them are a bit unpleasant.

You might be able to find a better investment than Kangda International Environmental. 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.