China Water Industry Group Limited (HKG:1129) shares have had a really impressive month, gaining 46% after a shaky period beforehand. But the last month did very little to improve the 73% share price decline over the last year.

Even after such a large jump in price, you could still be forgiven for feeling indifferent about China Water Industry Group's P/S ratio of 0.4x, since the median price-to-sales (or "P/S") ratio for the Water Utilities industry in Hong Kong is about the same. While this might not raise any eyebrows, if the P/S ratio is not justified investors could be missing out on a potential opportunity or ignoring looming disappointment.

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Check out our latest analysis for China Water Industry Group

How Has China Water Industry Group Performed Recently?

For instance, China Water Industry Group's receding revenue in recent times would have to be some food for thought. One possibility is that the P/S is moderate because investors think the company might still do enough to be in line with the broader industry in the near future. If not, then existing shareholders may be a little nervous about the viability of the share price.

We don't have analyst forecasts, but you can see how recent trends are setting up the company for the future by checking out our free report on China Water Industry Group's earnings, revenue and cash flow.

What Are Revenue Growth Metrics Telling Us About The P/S?

China Water Industry Group's P/S ratio would be typical for a company that's only expected to deliver moderate growth, and importantly, perform in line with the industry.

Taking a look back first, the company's revenue growth last year wasn't something to get excited about as it posted a disappointing decline of 28%. This means it has also seen a slide in revenue over the longer-term as revenue is down 51% in total over the last three years. Accordingly, shareholders would have felt downbeat about the medium-term rates of revenue growth.

Weighing that medium-term revenue trajectory against the broader industry's one-year forecast for expansion of 6.4% shows it's an unpleasant look.

With this information, we find it concerning that China Water Industry Group is trading at a fairly similar P/S compared to the industry. It seems most investors are ignoring the recent poor growth rate and are hoping for a turnaround in the company's business prospects. Only the boldest would assume these prices are sustainable as a continuation of recent revenue trends is likely to weigh on the share price eventually.

What Does China Water Industry Group's P/S Mean For Investors?

China Water Industry Group appears to be back in favour with a solid price jump bringing its P/S back in line with other companies in the industry Generally, our preference is to limit the use of the price-to-sales ratio to establishing what the market thinks about the overall health of a company.

Our look at China Water Industry Group revealed its shrinking revenues over the medium-term haven't impacted the P/S as much as we anticipated, given the industry is set to grow. When we see revenue heading backwards in the context of growing industry forecasts, it'd make sense to expect a possible share price decline on the horizon, sending the moderate P/S lower. Unless the recent medium-term conditions improve markedly, investors will have a hard time accepting the share price as fair value.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 4 warning signs with China Water Industry Group (at least 2 which are potentially serious), and understanding these should be part of your investment process.

It's important to make sure you look for a great company, not just the first idea you come across. So if growing profitability aligns with your idea of a great company, take a peek at this free list of interesting companies with strong recent earnings growth (and a low P/E).

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.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.