With a median price-to-earnings (or "P/E") ratio of close to 18x in the United States, you could be forgiven for feeling indifferent about United Rentals, Inc.'s (NYSE:URI) P/E ratio of 18.7x. Although, it's not wise to simply ignore the P/E without explanation as investors may be disregarding a distinct opportunity or a costly mistake.

With its earnings growth in positive territory compared to the declining earnings of most other companies, United Rentals has been doing quite well of late. One possibility is that the P/E is moderate because investors think the company's earnings will be less resilient moving forward. 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 not quite in favour.

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

The only time you'd be comfortable seeing a P/E like United Rentals' is when the company's growth is tracking the market closely.

If we review the last year of earnings growth, the company posted a terrific increase of 18%. The latest three year period has also seen an excellent 197% overall rise in EPS, aided by its short-term performance. So we can start by confirming that the company has done a great job of growing earnings over that time.

Turning to the outlook, the next three years should generate growth of 11% per annum as estimated by the analysts watching the company. That's shaping up to be similar to the 10% each year growth forecast for the broader market.

In light of this, it's understandable that United Rentals' P/E sits in line with the majority of other companies. Apparently shareholders are comfortable to simply hold on while the company is keeping a low profile.

The Key Takeaway

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.

We've established that United Rentals maintains its moderate P/E off the back of its forecast growth being in line with the wider market, as expected. Right now shareholders are comfortable with the P/E as they are quite confident future earnings won't throw up any surprises. It's hard to see the share price moving strongly in either direction in the near future under these circumstances.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 2 warning signs with United Rentals, and understanding these should be part of your investment process.

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