With a price-to-earnings (or "P/E") ratio of 71.4x CSSC Offshore & Marine Engineering (Group) Company Limited (HKG:317) may be sending very bearish signals at the moment, given that almost half of all companies in Hong Kong have P/E ratios under 9x and even P/E's lower than 5x are not unusual. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.

As an illustration, earnings have deteriorated at CSSC Offshore & Marine Engineering (Group) over the last year, which is not ideal at all. 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. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

How Is CSSC Offshore & Marine Engineering (Group)'s Growth Trending?

The only time you'd be truly comfortable seeing a P/E as steep as CSSC Offshore & Marine Engineering (Group)'s is when the company's growth is on track to outshine the market decidedly.

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 69%. This means it has also seen a slide in earnings over the longer-term as EPS is down 40% in total over the last three years. Therefore, it's fair to say the earnings growth recently has been undesirable for the company.

Comparing that to the market, which is predicted to deliver 22% growth in the next 12 months, the company's downward momentum based on recent medium-term earnings results is a sobering picture.

In light of this, it's alarming that CSSC Offshore & Marine Engineering (Group)'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. There's a very good chance existing shareholders are setting themselves up for future disappointment if the P/E falls to levels more in line with the recent negative growth rates.

The Key Takeaway

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 CSSC Offshore & Marine Engineering (Group) currently trades on a much higher than expected P/E since its recent earnings have been in decline over the medium-term. When we see earnings heading backwards and underperforming the market forecasts, 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.

There are also other vital risk factors to consider before investing and we've discovered 1 warning sign for CSSC Offshore & Marine Engineering (Group) that you should be aware of.

Of course, you might also be able to find a better stock than CSSC Offshore & Marine Engineering (Group). 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.