Jiangsu Ruitai New Energy Materials Co., Ltd. (SZSE:301238) shares have had a really impressive month, gaining 32% after a shaky period beforehand. Longer-term shareholders would be thankful for the recovery in the share price since it's now virtually flat for the year after the recent bounce.

Following the firm bounce in price, Jiangsu Ruitai New Energy Materials' price-to-earnings (or "P/E") ratio of 44.2x might make it look like a sell right now compared to the market in China, where around half of the companies have P/E ratios below 29x and even P/E's below 18x are quite common. However, the P/E might be high for a reason and it requires further investigation to determine if it's justified.

For example, consider that Jiangsu Ruitai New Energy Materials' financial performance has been poor lately as its earnings have been in decline. One possibility is that the P/E is high because investors think the company will still do enough to outperform the broader market in the near future. If not, then existing shareholders may be quite nervous about the viability of the share price.

How Is Jiangsu Ruitai New Energy Materials' Growth Trending?

The only time you'd be truly comfortable seeing a P/E as high as Jiangsu Ruitai New Energy Materials' is when the company's growth is on track to outshine the market.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 46%. The last three years don't look nice either as the company has shrunk EPS by 27% in aggregate. So unfortunately, we have to acknowledge that the company has not done a great job of growing earnings over that time.

In contrast to the company, the rest of the market is expected to grow by 36% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

With this information, we find it concerning that Jiangsu Ruitai New Energy Materials is trading at a P/E higher than the market. 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 earnings trends is likely to weigh heavily on the share price eventually.

What We Can Learn From Jiangsu Ruitai New Energy Materials' P/E?

Jiangsu Ruitai New Energy Materials' P/E is getting right up there since its shares have risen strongly. It's argued the price-to-earnings ratio is an inferior measure of value within certain industries, but it can be a powerful business sentiment indicator.

Our examination of Jiangsu Ruitai New Energy Materials revealed its shrinking earnings over the medium-term aren't impacting its high P/E anywhere near as much as we would have predicted, given the market is set to grow. Right now we are increasingly uncomfortable with the high P/E as this earnings performance is highly unlikely to support such positive sentiment for long. Unless the recent medium-term conditions improve markedly, it's very challenging to accept these prices as being reasonable.

Having said that, be aware Jiangsu Ruitai New Energy Materials is showing 3 warning signs in our investment analysis, and 1 of those makes us a bit uncomfortable.

It's important to make sure you look for a great company, not just the first idea you come across. So 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.