The Tanyuan Technology Co.,Ltd. (SHSE:603133) share price has fared very poorly over the last month, falling by a substantial 28%. For any long-term shareholders, the last month ends a year to forget by locking in a 58% share price decline.

Although its price has dipped substantially, you could still be forgiven for thinking Tanyuan TechnologyLtd is a stock to steer clear of with a price-to-sales ratios (or "P/S") of 9.5x, considering almost half the companies in China's Electrical industry have P/S ratios below 1.8x. However, the P/S might be quite high for a reason and it requires further investigation to determine if it's justified.

What Does Tanyuan TechnologyLtd's Recent Performance Look Like?

As an illustration, revenue has deteriorated at Tanyuan TechnologyLtd over the last year, which is not ideal at all. One possibility is that the P/S is high because investors think the company will still do enough to outperform the broader industry in the near future. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

Do Revenue Forecasts Match The High P/S Ratio?

The only time you'd be truly comfortable seeing a P/S as steep as Tanyuan TechnologyLtd's is when the company's growth is on track to outshine the industry decidedly.

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 16%. This means it has also seen a slide in revenue over the longer-term as revenue is down 83% in total over the last three years. Accordingly, shareholders would have felt downbeat about the medium-term rates of revenue growth.

In contrast to the company, the rest of the industry is expected to grow by 27% over the next year, which really puts the company's recent medium-term revenue decline into perspective.

In light of this, it's alarming that Tanyuan TechnologyLtd's P/S sits above the majority of other companies. It seems most investors are ignoring the recent poor growth rate and are hoping for a turnaround in the company's business prospects. 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 Key Takeaway

Even after such a strong price drop, Tanyuan TechnologyLtd's P/S still exceeds the industry median significantly. 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 Tanyuan TechnologyLtd 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. With a revenue decline on investors' minds, the likelihood of a souring sentiment is quite high which could send the P/S back in line with what we'd expect. Unless the recent medium-term conditions improve markedly, investors will have a hard time accepting the share price as fair value.

And what about other risks? Every company has them, and we've spotted 2 warning signs for Tanyuan TechnologyLtd you should know about.

If these risks are making you reconsider your opinion on Tanyuan TechnologyLtd, explore our interactive list of high quality stocks to get an idea of what else is out there.

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.