With a price-to-earnings (or "P/E") ratio of 20x Core Laboratories Inc. (NYSE:CLB) may be sending bearish signals at the moment, given that almost half of all companies in the United States have P/E ratios under 16x and even P/E's lower than 9x are not unusual. However, the P/E might be high for a reason and it requires further investigation to determine if it's justified.

With its earnings growth in positive territory compared to the declining earnings of most other companies, Core Laboratories has been doing quite well of late. The P/E is probably high because investors think the company will continue to navigate the broader market headwinds better than most. If not, then existing shareholders might be a little nervous about the viability of the share price.

Check out our latest analysis for Core Laboratories

How Is Core Laboratories' Growth Trending?

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

Retrospectively, the last year delivered an exceptional 166% gain to the company's bottom line. However, the latest three year period hasn't been as great in aggregate as it didn't manage to provide any growth at all. So it appears to us that the company has had a mixed result in terms of growing earnings over that time.

Looking ahead now, EPS is anticipated to climb by 25% per year during the coming three years according to the eight analysts following the company. Meanwhile, the rest of the market is forecast to only expand by 13% per annum, which is noticeably less attractive.

With this information, we can see why Core Laboratories is trading at such a high P/E compared to the market. It seems most investors are expecting this strong future growth and are willing to pay more for the stock.

The Final Word

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.

As we suspected, our examination of Core Laboratories' analyst forecasts revealed that its superior earnings outlook is contributing to its high P/E. Right now shareholders are comfortable with the P/E as they are quite confident future earnings aren't under threat. Unless these conditions change, they will continue to provide strong support to the share price.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 1 warning sign with Core Laboratories, and understanding should be part of your investment process.

You might be able to find a better investment than Core Laboratories. If you want a selection of possible candidates, check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.