Shinelong Automotive Lightweight Application Limited (HKG:1930) shares have had a really impressive month, gaining 27% 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 11% over that time.

Even after such a large jump in price, it's still not a stretch to say that Shinelong Automotive Lightweight Application's price-to-earnings (or "P/E") ratio of 8.7x right now seems quite "middle-of-the-road" compared to the market in Hong Kong, where the median P/E ratio is around 9x. Although, it's not wise to simply ignore the P/E without explanation as investors may be disregarding a distinct opportunity or a costly mistake.

For instance, Shinelong Automotive Lightweight Application's receding earnings in recent times would have to be some food for thought. One possibility is that the P/E is moderate because investors think the company might still do enough to be in line with the broader market in the near future. If not, then existing shareholders may be a little nervous about the viability of the share price.

View our latest analysis for Shinelong Automotive Lightweight Application

Does Growth Match The P/E?

The only time you'd be comfortable seeing a P/E like Shinelong Automotive Lightweight Application's is when the company's growth is tracking the market closely.

Taking a look back first, the company's earnings per share growth last year wasn't something to get excited about as it posted a disappointing decline of 25%. This means it has also seen a slide in earnings over the longer-term as EPS is down 49% in total over the last three years. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

In contrast to the company, the rest of the market is expected to grow by 16% 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 Shinelong Automotive Lightweight Application is trading at a fairly similar P/E to the market. It seems most investors are ignoring the recent poor growth rate 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 earnings trends is likely to weigh on the share price eventually.

What We Can Learn From Shinelong Automotive Lightweight Application's P/E?

Shinelong Automotive Lightweight Application appears to be back in favour with a solid price jump getting its P/E back in line with most other companies. Using the price-to-earnings ratio alone to determine if you should sell your stock isn't sensible, however it can be a practical guide to the company's future prospects.

We've established that Shinelong Automotive Lightweight Application currently trades on a higher than expected P/E since its recent earnings have been in decline over the medium-term. Right now we are uncomfortable with the P/E as this earnings performance is unlikely to support a more positive sentiment for long. If recent medium-term earnings trends continue, it will place shareholders' investments at risk and potential investors in danger of paying an unnecessary premium.

Plus, you should also learn about these 4 warning signs we've spotted with Shinelong Automotive Lightweight Application (including 1 which can't be ignored).

Of course, you might also be able to find a better stock than Shinelong Automotive Lightweight Application. So you may wish to see this free collection of other companies that sit on P/E's below 20x and have grown earnings strongly.

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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.