Tianjin Pengling Group Co.,Ltd (SZSE:300375) shareholders won't be pleased to see that the share price has had a very rough month, dropping 27% and undoing the prior period's positive performance. Longer-term, the stock has been solid despite a difficult 30 days, gaining 14% in the last year.

Although its price has dipped substantially, Tianjin Pengling GroupLtd's price-to-earnings (or "P/E") ratio of 51.1x might still make it look like a strong sell right now compared to the market in China, where around half of the companies have P/E ratios below 31x and even P/E's below 19x are quite common. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the highly elevated P/E.

For instance, Tianjin Pengling GroupLtd's receding earnings in recent times would have to be some food for thought. 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.

View our latest analysis for Tianjin Pengling GroupLtd

How Is Tianjin Pengling GroupLtd's Growth Trending?

In order to justify its P/E ratio, Tianjin Pengling GroupLtd would need to produce outstanding growth well in excess of the market.

Retrospectively, the last year delivered a frustrating 1.8% decrease to the company's bottom line. This means it has also seen a slide in earnings over the longer-term as EPS is down 61% in total over the last three years. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

Weighing that medium-term earnings trajectory against the broader market's one-year forecast for expansion of 43% shows it's an unpleasant look.

In light of this, it's alarming that Tianjin Pengling GroupLtd's P/E sits above the majority of other companies. 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 heavily on the share price eventually.

The Final Word

Tianjin Pengling GroupLtd's shares may have retreated, but its P/E is still flying high. We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

Our examination of Tianjin Pengling GroupLtd 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 Tianjin Pengling GroupLtd is showing 5 warning signs in our investment analysis, and 2 of those don't sit too well with us.

If you're unsure about the strength of Tianjin Pengling GroupLtd's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.