When you see that almost half of the companies in the Water Utilities industry in China have price-to-sales ratios (or "P/S") below 2.4x, SafBon Water Service (Holding) Inc.,Shanghai (SZSE:300262) looks to be giving off strong sell signals with its 7.3x P/S ratio. However, the P/S might be quite high for a reason and it requires further investigation to determine if it's justified.

See our latest analysis for SafBon Water Service (Holding)Shanghai

How Has SafBon Water Service (Holding)Shanghai Performed Recently?

Recent times have been quite advantageous for SafBon Water Service (Holding)Shanghai as its revenue has been rising very briskly. Perhaps the market is expecting future revenue performance to outperform the wider market, which has seemingly got people interested in the stock. If not, then existing shareholders might be a little nervous about the viability of the share price.

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

SafBon Water Service (Holding)Shanghai's P/S ratio would be typical for a company that's expected to deliver very strong growth, and importantly, perform much better than the industry.

Taking a look back first, we see that the company's revenues underwent some rampant growth over the last 12 months. Despite this strong recent growth, it's still struggling to catch up as its three-year revenue frustratingly shrank by 61% overall. Therefore, it's fair to say the revenue growth recently has been undesirable for the company.

Weighing that medium-term revenue trajectory against the broader industry's one-year forecast for expansion of 11% shows it's an unpleasant look.

In light of this, it's alarming that SafBon Water Service (Holding)Shanghai's P/S sits above the majority of other companies. Apparently many investors in the company are way more bullish than recent times would indicate and aren't willing to let go of their stock at any price. There's a very good chance existing shareholders are setting themselves up for future disappointment if the P/S falls to levels more in line with the recent negative growth rates.

The Final Word

Using the price-to-sales ratio alone to determine if you should sell your stock isn't sensible, however it can be a practical guide to the company's future prospects.

Our examination of SafBon Water Service (Holding)Shanghai revealed its shrinking revenue over the medium-term isn't resulting in a P/S as low as we expected, given the industry is set to grow. When we see revenue heading backwards and underperforming the industry forecasts, we feel the possibility of the share price declining is very real, bringing the P/S back into the realm of reasonability. If recent medium-term revenue trends continue, it will place shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

You always need to take note of risks, for example - SafBon Water Service (Holding)Shanghai has 3 warning signs we think you should be aware of.

Of course, profitable companies with a history of great earnings growth are generally safer bets. So you may wish to see this free collection of other companies that have reasonable P/E ratios and have grown earnings strongly.

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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.