Guangdong DP Co.,Ltd. (SZSE:300808) shareholders have had their patience rewarded with a 29% share price jump in the last month. Looking back a bit further, it's encouraging to see the stock is up 26% in the last year.

Following the firm bounce in price, when almost half of the companies in China's Electrical industry have price-to-sales ratios (or "P/S") below 2.3x, you may consider Guangdong DPLtd as a stock not worth researching with its 6.2x P/S ratio. Although, it's not wise to just take the P/S at face value as there may be an explanation why it's so lofty.

What Does Guangdong DPLtd's Recent Performance Look Like?

For instance, Guangdong DPLtd's receding revenue in recent times would have to be some food for thought. 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. If not, then existing shareholders may be quite nervous about the viability of the share price.

Is There Enough Revenue Growth Forecasted For Guangdong DPLtd?

The only time you'd be truly comfortable seeing a P/S as steep as Guangdong DPLtd'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 4.1%. As a result, revenue from three years ago have also fallen 34% overall. Accordingly, shareholders would have felt downbeat about the medium-term rates of revenue growth.

Weighing that medium-term revenue trajectory against the broader industry's one-year forecast for expansion of 24% shows it's an unpleasant look.

With this information, we find it concerning that Guangdong DPLtd 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. 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 Bottom Line On Guangdong DPLtd's P/S

Guangdong DPLtd's P/S has grown nicely over the last month thanks to a handy boost in the share price. 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.

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

Don't forget that there may be other risks. For instance, we've identified 4 warning signs for Guangdong DPLtd (2 are potentially serious) you should be aware of.

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.