Langfang Development Co., Ltd. (SHSE:600149) shares have had a really impressive month, gaining 29% after a shaky period beforehand. Unfortunately, the gains of the last month did little to right the losses of the last year with the stock still down 22% over that time.

Since its price has surged higher, given around half the companies in China's Trade Distributors industry have price-to-sales ratios (or "P/S") below 0.7x, you may consider Langfang Development as a stock to avoid entirely with its 7.9x P/S ratio. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the highly elevated P/S.

What Does Langfang Development's P/S Mean For Shareholders?

As an illustration, revenue has deteriorated at Langfang Development over the last year, which is not ideal at all. It might be that many expect the company to still outplay most other companies over the coming period, which has kept the P/S from collapsing. However, if this isn't the case, investors might get caught out paying too much for the stock.

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

Langfang Development'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.

In reviewing the last year of financials, we were disheartened to see the company's revenues fell to the tune of 9.8%. Unfortunately, that's brought it right back to where it started three years ago with revenue growth being virtually non-existent overall during that time. Accordingly, shareholders probably wouldn't have been overly satisfied with the unstable medium-term growth rates.

Comparing that to the industry, which is predicted to deliver 14% growth in the next 12 months, the company's momentum is weaker, based on recent medium-term annualised revenue results.

In light of this, it's alarming that Langfang Development's P/S sits above the majority of other companies. It seems most investors are ignoring the fairly limited recent growth rates 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.

The Bottom Line On Langfang Development's P/S

Shares in Langfang Development have seen a strong upwards swing lately, which has really helped boost its P/S figure. While the price-to-sales ratio shouldn't be the defining factor in whether you buy a stock or not, it's quite a capable barometer of revenue expectations.

Our examination of Langfang Development 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. Unless the recent medium-term conditions improve markedly, it's very challenging to accept these the share price as being reasonable.

There are also other vital risk factors to consider before investing and we've discovered 1 warning sign for Langfang Development that you should be aware of.

If you're unsure about the strength of Langfang Development's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.