With a price-to-earnings (or "P/E") ratio of 42.3x Shanghai Carthane Co.,Ltd. (SHSE:603037) may be sending bearish signals at the moment, given that almost half of all companies in China have P/E ratios under 34x and even P/E's lower than 20x are not unusual. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's as high as it is.

The earnings growth achieved at Shanghai CarthaneLtd over the last year would be more than acceptable for most companies. One possibility is that the P/E is high because investors think this respectable earnings growth will be enough to outperform the broader market in the near future. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

See our latest analysis for Shanghai CarthaneLtd

How Is Shanghai CarthaneLtd's Growth Trending?

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

Taking a look back first, we see that the company grew earnings per share by an impressive 27% last year. Pleasingly, EPS has also lifted 45% in aggregate from three years ago, thanks to the last 12 months of growth. Accordingly, shareholders would have probably welcomed those medium-term rates of earnings growth.

Comparing that to the market, which is predicted to deliver 44% growth in the next 12 months, the company's momentum is weaker based on recent medium-term annualised earnings results.

In light of this, it's alarming that Shanghai CarthaneLtd's P/E sits above the majority of other companies. It seems most investors are ignoring the fairly limited recent growth rates and are hoping for a turnaround in the company's business prospects. There's a good chance existing shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with recent growth rates.

The Final Word

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.

We've established that Shanghai CarthaneLtd currently trades on a much higher than expected P/E since its recent three-year growth is lower than the wider market forecast. When we see weak earnings with slower than market growth, we suspect the share price is at risk of declining, sending the high P/E lower. If recent medium-term earnings trends continue, it will place shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

Before you settle on your opinion, we've discovered 4 warning signs for Shanghai CarthaneLtd (2 don't sit too well with us!) that you should be aware of.

Of course, you might also be able to find a better stock than Shanghai CarthaneLtd. So you may wish to see this free collection of other companies that have reasonable P/E ratios 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.