Atmos Energy Corporation's (NYSE:ATO) price-to-earnings (or "P/E") ratio of 19.2x might make it look like a sell right now compared to the market in the United States, where around half of the companies have P/E ratios below 16x and even P/E's below 9x are quite common. 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, Atmos Energy has been doing quite well of late. It seems that many are expecting the company to continue defying the broader market adversity, which has increased investors' willingness to pay up for the stock. If not, then existing shareholders might be a little nervous about the viability of the share price.

Check out our latest analysis for Atmos Energy

Is There Enough Growth For Atmos Energy?

In order to justify its P/E ratio, Atmos Energy would need to produce impressive growth in excess of the market.

If we review the last year of earnings growth, the company posted a worthy increase of 8.7%. The latest three year period has also seen a 22% overall rise in EPS, aided somewhat by its short-term performance. Therefore, it's fair to say the earnings growth recently has been respectable for the company.

Turning to the outlook, the next three years should generate growth of 7.1% each year as estimated by the eight analysts watching the company. With the market predicted to deliver 12% growth per year, the company is positioned for a weaker earnings result.

In light of this, it's alarming that Atmos Energy's P/E sits above the majority of other companies. It seems most investors are hoping for a turnaround in the company's business prospects, but the analyst cohort is not so confident this will happen. 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.

What We Can Learn From Atmos Energy's P/E?

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.

Our examination of Atmos Energy's analyst forecasts revealed that its inferior earnings outlook isn't impacting its high P/E anywhere near as much as we would have predicted. When we see a weak earnings outlook with slower than market growth, we suspect the share price is at risk of declining, sending the high P/E lower. This places shareholders' investments at significant risk and potential investors in danger of paying an excessive premium.

Plus, you should also learn about these 2 warning signs we've spotted with Atmos Energy.

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.