Those holding Kunming Yunnei Power Co.,Ltd. (SZSE:000903) 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. Not all shareholders will be feeling jubilant, since the share price is still down a very disappointing 14% in the last twelve months.

Even after such a large jump in price, Kunming Yunnei PowerLtd may still be sending buy signals at present with its price-to-sales (or "P/S") ratio of 0.9x, considering almost half of all companies in the Machinery industry in China have P/S ratios greater than 2.8x and even P/S higher than 5x aren't out of the ordinary. However, the P/S might be low for a reason and it requires further investigation to determine if it's justified.

What Does Kunming Yunnei PowerLtd's Recent Performance Look Like?

As an illustration, revenue has deteriorated at Kunming Yunnei PowerLtd over the last year, which is not ideal at all. It might be that many expect the disappointing revenue performance to continue or accelerate, which has repressed the P/S. If you like the company, you'd be hoping this isn't the case so that you could potentially pick up some stock while it's out of favour.

Do Revenue Forecasts Match The Low P/S Ratio?

The only time you'd be truly comfortable seeing a P/S as low as Kunming Yunnei PowerLtd's is when the company's growth is on track to lag the industry.

In reviewing the last year of financials, we were disheartened to see the company's revenues fell to the tune of 24%. The last three years don't look nice either as the company has shrunk revenue by 50% in aggregate. So unfortunately, we have to acknowledge that the company has not done a great job of growing revenue over that time.

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.

With this information, we are not surprised that Kunming Yunnei PowerLtd is trading at a P/S lower than the industry. However, we think shrinking revenues are unlikely to lead to a stable P/S over the longer term, which could set up shareholders for future disappointment. Even just maintaining these prices could be difficult to achieve as recent revenue trends are already weighing down the shares.

What Does Kunming Yunnei PowerLtd's P/S Mean For Investors?

Kunming Yunnei PowerLtd's stock price has surged recently, but its but its P/S still remains modest. Generally, our preference is to limit the use of the price-to-sales ratio to establishing what the market thinks about the overall health of a company.

As we suspected, our examination of Kunming Yunnei PowerLtd revealed its shrinking revenue over the medium-term is contributing to its low P/S, given the industry is set to grow. At this stage investors feel the potential for an improvement in revenue isn't great enough to justify a higher P/S ratio. If recent medium-term revenue trends continue, it's hard to see the share price moving strongly in either direction in the near future under these circumstances.

Plus, you should also learn about this 1 warning sign we've spotted with Kunming Yunnei PowerLtd.

If strong companies turning a profit tickle your fancy, then you'll want to check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.