The Zhejiang Jindun Fans Co., Ltd (SZSE:300411) share price has softened a substantial 25% over the previous 30 days, handing back much of the gains the stock has made lately. Looking at the bigger picture, even after this poor month the stock is up 94% in the last year.

In spite of the heavy fall in price, you could still be forgiven for thinking Zhejiang Jindun Fans is a stock to steer clear of with a price-to-sales ratios (or "P/S") of 10.2x, considering almost half the companies in China's Machinery industry have P/S ratios below 2.5x. However, the P/S might be quite high for a reason and it requires further investigation to determine if it's justified.

How Zhejiang Jindun Fans Has Been Performing

Revenue has risen firmly for Zhejiang Jindun Fans recently, which is pleasing to see. One possibility is that the P/S ratio is high because investors think this respectable revenue growth will be enough to outperform the broader industry in the near future. However, if this isn't the case, investors might get caught out paying too much for the stock.

Is There Enough Revenue Growth Forecasted For Zhejiang Jindun Fans?

In order to justify its P/S ratio, Zhejiang Jindun Fans would need to produce outstanding growth that's well in excess of the industry.

If we review the last year of revenue growth, the company posted a terrific increase of 18%. Still, revenue has fallen 26% in total from three years ago, which is quite disappointing. Therefore, it's fair to say the revenue growth recently has been undesirable for the company.

In contrast to the company, the rest of the industry is expected to grow by 23% over the next year, which really puts the company's recent medium-term revenue decline into perspective.

With this information, we find it concerning that Zhejiang Jindun Fans is trading at a P/S higher than 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 heavily on the share price eventually.

What We Can Learn From Zhejiang Jindun Fans' P/S?

Zhejiang Jindun Fans' shares may have suffered, but its P/S remains high. 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.

We've established that Zhejiang Jindun Fans currently trades on a much higher than expected P/S since its recent revenues have been in decline over the medium-term. 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.

Plus, you should also learn about these 2 warning signs we've spotted with Zhejiang Jindun Fans (including 1 which is potentially serious).

If companies with solid past earnings growth is up your alley, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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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.

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