MRC Global Inc.'s (NYSE:MRC) price-to-earnings (or "P/E") ratio of 14.3x might make it look like a buy right now compared to the market in the United States, where around half of the companies have P/E ratios above 17x and even P/E's above 32x are quite common. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the reduced P/E.

With its earnings growth in positive territory compared to the declining earnings of most other companies, MRC Global has been doing quite well of late. One possibility is that the P/E is low because investors think the company's earnings are going to fall away like everyone else's soon. If not, then existing shareholders have reason to be quite optimistic about the future direction of the share price.

What Are Growth Metrics Telling Us About The Low P/E?

The only time you'd be truly comfortable seeing a P/E as low as MRC Global's is when the company's growth is on track to lag the market.

If we review the last year of earnings growth, the company posted a worthy increase of 7.8%. However, due to its less than impressive performance prior to this period, EPS growth is practically non-existent over the last three years overall. Therefore, it's fair to say that earnings growth has been inconsistent recently for the company.

Looking ahead now, EPS is anticipated to climb by 8.7% each year during the coming three years according to the five analysts following the company. With the market predicted to deliver 9.9% growth per year, the company is positioned for a comparable earnings result.

In light of this, it's peculiar that MRC Global's P/E sits below the majority of other companies. It may be that most investors are not convinced the company can achieve future growth expectations.

The Final Word

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 MRC Global currently trades on a lower than expected P/E since its forecast growth is in line with the wider market. There could be some unobserved threats to earnings preventing the P/E ratio from matching the outlook. It appears some are indeed anticipating earnings instability, because these conditions should normally provide more 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 MRC Global, and understanding should be part of your investment process.

If P/E ratios interest you, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

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