Those holding Tianjin Guoan Mengguli New Materials Science & Technology Co., Ltd. (SZSE:301487) shares would be relieved that the share price has rebounded 29% in the last thirty days, but it needs to keep going to repair the recent damage it has caused to investor portfolios. While recent buyers may be laughing, long-term holders might not be as pleased since the recent gain only brings the stock back to where it started a year ago.

After such a large jump in price, you could be forgiven for thinking Tianjin Guoan Mengguli New Materials Science & Technology is a stock to steer clear of with a price-to-sales ratios (or "P/S") of 6.9x, considering almost half the companies in China's Electrical industry have P/S ratios below 2.1x. However, the P/S might be quite high for a reason and it requires further investigation to determine if it's justified.

What Does Tianjin Guoan Mengguli New Materials Science & Technology's Recent Performance Look Like?

For example, consider that Tianjin Guoan Mengguli New Materials Science & Technology's financial performance has been poor lately as its revenue has been in decline. 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.

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

Tianjin Guoan Mengguli New Materials Science & Technology'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, the company's revenue growth last year wasn't something to get excited about as it posted a disappointing decline of 29%. However, a few very strong years before that means that it was still able to grow revenue by an impressive 49% in total over the last three years. Although it's been a bumpy ride, it's still fair to say the revenue growth recently has been more than adequate for the company.

Comparing that to the industry, which is predicted to deliver 26% growth in the next 12 months, the company's momentum is weaker, based on recent medium-term annualised revenue results.

With this information, we find it concerning that Tianjin Guoan Mengguli New Materials Science & Technology is trading at a P/S higher than the industry. 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. 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.

The Bottom Line On Tianjin Guoan Mengguli New Materials Science & Technology's P/S

Tianjin Guoan Mengguli New Materials Science & Technology's P/S has grown nicely over the last month thanks to a handy boost in the share price. 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 Tianjin Guoan Mengguli New Materials Science & Technology revealed its poor three-year revenue trends aren't detracting from the P/S as much as we though, given they look worse than current industry expectations. When we see slower than industry revenue growth but an elevated P/S, there's considerable risk of the share price declining, sending the P/S lower. 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.

Many other vital risk factors can be found on the company's balance sheet. Take a look at our free balance sheet analysis for Tianjin Guoan Mengguli New Materials Science & Technology with six simple checks on some of these key factors.

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.