Those holding China Water Industry Group Limited (HKG:1129) shares would be relieved that the share price has rebounded 38% in the last thirty days, but it needs to keep going to repair the recent damage it has caused to investor portfolios. Still, the 30-day jump doesn't change the fact that longer term shareholders have seen their stock decimated by the 79% share price drop in the last twelve months.

Although its price has surged higher, there still wouldn't be many who think China Water Industry Group's price-to-sales (or "P/S") ratio of 0.3x is worth a mention when the median P/S in Hong Kong's Water Utilities industry is similar at about 0.4x. 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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View our latest analysis for China Water Industry Group

What Does China Water Industry Group's Recent Performance Look Like?

As an illustration, revenue has deteriorated at China Water Industry Group over the last year, which is not ideal at all. Perhaps investors believe the recent revenue performance is enough to keep in line with the industry, which is keeping the P/S from dropping off. If not, then existing shareholders may be a little nervous about the viability of the share price.

Want the full picture on earnings, revenue and cash flow for the company? Then our free report on China Water Industry Group will help you shine a light on its historical performance.

Do Revenue Forecasts Match The P/S Ratio?

There's an inherent assumption that a company should be matching the industry for P/S ratios like China Water Industry Group's to be considered reasonable.

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 27%. 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. Therefore, it's fair to say the revenue growth recently has been undesirable for the company.

Comparing that to the industry, which is predicted to deliver 6.9% growth in the next 12 months, the company's downward momentum based on recent medium-term revenue results is a sobering picture.

With this in mind, we find it worrying that China Water Industry Group's P/S exceeds that of its industry peers. Apparently many investors in the company are way less bearish than recent times would indicate and aren't willing to let go of their stock right now. 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 It's argued the price-to-sales ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

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 is also worth noting that we have found 4 warning signs for China Water Industry Group (3 can't be ignored!) that you need to take into consideration.

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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.