When close to half the companies in the United States have price-to-earnings ratios (or "P/E's") below 16x, you may consider Exponent, Inc. (NASDAQ:EXPO) as a stock to avoid entirely with its 44.2x P/E ratio. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so lofty.

With earnings growth that's superior to most other companies of late, Exponent has been doing relatively well. The P/E is probably high because investors think this strong earnings performance will continue. If not, then existing shareholders might be a little nervous about the viability of the share price.

See our latest analysis for Exponent

Does Growth Match The High P/E?

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

Taking a look back first, we see that the company managed to grow earnings per share by a handy 3.6% last year. Pleasingly, EPS has also lifted 32% in aggregate from three years ago, partly thanks to the last 12 months of growth. Therefore, it's fair to say the earnings growth recently has been superb for the company.

Turning to the outlook, the next year should generate growth of 6.1% as estimated by the three analysts watching the company. With the market predicted to deliver 10% growth , the company is positioned for a weaker earnings result.

With this information, we find it concerning that Exponent is trading at a P/E higher than the market. Apparently many investors in the company are way more bullish than analysts indicate and aren't willing to let go of their stock at any price. Only the boldest would assume these prices are sustainable as this level of earnings growth is likely to weigh heavily on the share price eventually.

The Key Takeaway

While the price-to-earnings ratio shouldn't be the defining factor in whether you buy a stock or not, it's quite a capable barometer of earnings expectations.

We've established that Exponent currently trades on a much higher than expected P/E since its forecast growth is lower than the wider market. Right now we are increasingly uncomfortable with the high P/E as the predicted future earnings aren't likely to support such positive sentiment for long. Unless these conditions improve markedly, it's very challenging to accept these prices as being reasonable.

Many other vital risk factors can be found on the company's balance sheet. Take a look at our free balance sheet analysis for Exponent with six simple checks on some of these key factors.

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

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.
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.