Jiawei Renewable Energy Co., Ltd. (SZSE:300317) shareholders would be excited to see that the share price has had a great month, posting a 28% gain and recovering from prior weakness. Unfortunately, the gains of the last month did little to right the losses of the last year with the stock still down 16% over that time.

Following the firm bounce in price, given around half the companies in China's Electrical industry have price-to-sales ratios (or "P/S") below 2.1x, you may consider Jiawei Renewable Energy as a stock to avoid entirely with its 4.5x 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 Jiawei Renewable Energy's P/S Mean For Shareholders?

With revenue growth that's exceedingly strong of late, Jiawei Renewable Energy has been doing very well. The P/S ratio is probably high because investors think this strong 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.

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

Jiawei Renewable Energy'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, we see that the company grew revenue by an impressive 60% last year. As a result, it also grew revenue by 5.4% in total over the last three years. So we can start by confirming that the company has actually done a good job of growing revenue over that time.

This is in contrast to the rest of the industry, which is expected to grow by 23% over the next year, materially higher than the company's recent medium-term annualised growth rates.

In light of this, it's alarming that Jiawei Renewable Energy's P/S sits above the majority of other companies. 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 Jiawei Renewable Energy's P/S

Shares in Jiawei Renewable Energy have seen a strong upwards swing lately, which has really helped boost its P/S figure. We'd say the price-to-sales ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

Our examination of Jiawei Renewable Energy 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. Right now we aren't comfortable with the high P/S as this revenue performance isn't likely to support such positive sentiment for long. Unless there is a significant improvement in the company's medium-term performance, it will be difficult to prevent the P/S ratio from declining to a more reasonable level.

There are also other vital risk factors to consider before investing and we've discovered 1 warning sign for Jiawei Renewable Energy that 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.