When close to half the companies in the United States have price-to-earnings ratios (or "P/E's") above 17x, you may consider General Motors Company (NYSE:GM) as a highly attractive investment with its 5.1x P/E ratio. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the highly reduced P/E.

With its earnings growth in positive territory compared to the declining earnings of most other companies, General Motors has been doing quite well of late. It might be that many expect the strong earnings performance to degrade substantially, possibly more than the market, which has repressed the P/E. If you like the company, you'd be hoping this isn't the case so that you could potentially pick up some stock while it's out of favour.

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

The only time you'd be truly comfortable seeing a P/E as depressed as General Motors' is when the company's growth is on track to lag the market decidedly.

Taking a look back first, we see that the company grew earnings per share by an impressive 25% last year. Pleasingly, EPS has also lifted 49% 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.

Turning to the outlook, the next three years should generate growth of 4.9% per annum as estimated by the analysts watching the company. With the market predicted to deliver 10.0% growth per year, the company is positioned for a weaker earnings result.

With this information, we can see why General Motors is trading at a P/E lower than the market. It seems most investors are expecting to see limited future growth and are only willing to pay a reduced amount for the stock.

The Bottom Line On General Motors' P/E

Typically, we'd caution against reading too much into price-to-earnings ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

As we suspected, our examination of General Motors' analyst forecasts revealed that its inferior earnings outlook is contributing to its low P/E. At this stage investors feel the potential for an improvement in earnings isn't great enough to justify a higher P/E ratio. It's hard to see the share price rising strongly in the near future under these circumstances.

Don't forget that there may be other risks. For instance, we've identified 3 warning signs for General Motors (2 are concerning) you should be aware of.

Of course, you might find a fantastic investment by looking at a few good candidates. So take a peek at this free list of companies with a strong growth track record, trading on a low P/E.

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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.

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