Nanjing Sample Technology Company Limited (HKG:1708) shareholders are no doubt pleased to see that the share price has bounced 32% in the last month, although it is still struggling to make up recently lost ground. Still, the 30-day jump doesn't change the fact that longer term shareholders have seen their stock decimated by the 85% share price drop in the last twelve months.

Although its price has surged higher, you could still be forgiven for feeling indifferent about Nanjing Sample Technology's P/S ratio of 0.8x, since the median price-to-sales (or "P/S") ratio for the Electronic industry in Hong Kong is also close to 0.4x. However, investors might be overlooking a clear opportunity or potential setback if there is no rational basis for the P/S.

How Has Nanjing Sample Technology Performed Recently?

Nanjing Sample Technology certainly has been doing a great job lately as it's been growing its revenue at a really rapid pace. The P/S is probably moderate because investors think this strong revenue growth might not be enough to outperform the broader industry in the near future. 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 not quite in favour.

How Is Nanjing Sample Technology's Revenue Growth Trending?

There's an inherent assumption that a company should be matching the industry for P/S ratios like Nanjing Sample Technology's to be considered reasonable.

If we review the last year of revenue growth, the company posted a terrific increase of 54%. However, this wasn't enough as the latest three year period has seen the company endure a nasty 66% drop in revenue in aggregate. Accordingly, shareholders would have felt downbeat about the medium-term rates of revenue growth.

Comparing that to the industry, which is predicted to deliver 24% growth in the next 12 months, the company's downward momentum based on recent medium-term revenue results is a sobering picture.

With this information, we find it concerning that Nanjing Sample Technology is trading at a fairly similar P/S compared to the industry. 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. There's a 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

Nanjing Sample Technology appears to be back in favour with a solid price jump bringing its P/S back in line with other companies in the industry We'd say the price-to-sales ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

We find it unexpected that Nanjing Sample Technology trades at a P/S ratio that is comparable to the rest of the industry, despite experiencing declining revenues during the medium-term, while the industry as a whole is expected to grow. Even though it matches the industry, we're uncomfortable with the current P/S ratio, as this dismal revenue performance is unlikely to support a more positive sentiment for long. If recent medium-term revenue trends continue, it will place shareholders' investments at risk and potential investors in danger of paying an unnecessary premium.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 3 warning signs with Nanjing Sample Technology (at least 2 which are concerning), and understanding them 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).

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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.