It's not a stretch to say that Adtalem Global Education Inc.'s (NYSE:ATGE) price-to-earnings (or "P/E") ratio of 16.7x right now seems quite "middle-of-the-road" compared to the market in the United States, where the median P/E ratio is around 17x. However, investors might be overlooking a clear opportunity or potential setback if there is no rational basis for the P/E.

With earnings growth that's exceedingly strong of late, Adtalem Global Education has been doing very well. It might be that many expect the strong earnings performance to wane, which has kept the P/E from rising. 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 Adtalem Global Education's is when the company's growth is tracking the market closely.

Retrospectively, the last year delivered an exceptional 277% gain to the company's bottom line. However, this wasn't enough as the latest three year period has seen a very unpleasant 39% drop in EPS in aggregate. Accordingly, shareholders would have felt downbeat about the medium-term rates of earnings growth.

In contrast to the company, the rest of the market is expected to grow by 11% over the next year, which really puts the company's recent medium-term earnings decline into perspective.

In light of this, it's somewhat alarming that Adtalem Global Education's P/E sits in line with the majority of other companies. Apparently many investors in the company are way less bearish than recent times would indicate and aren't willing to let go of their stock right now. Only the boldest would assume these prices are sustainable as a continuation of recent earnings trends is likely to weigh on the share price eventually.

What We Can Learn From Adtalem Global Education's P/E?

We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

We've established that Adtalem Global Education currently trades on a higher than expected P/E since its recent earnings have been in decline over the medium-term. When we see earnings heading backwards and underperforming the market forecasts, we suspect the share price is at risk of declining, sending the moderate P/E lower. If recent medium-term earnings trends continue, it will place shareholders' investments at risk and potential investors in danger of paying an unnecessary premium.

The company's balance sheet is another key area for risk analysis. You can assess many of the main risks through our free balance sheet analysis for Adtalem Global Education with six simple checks.

Of course, you might also be able to find a better stock than Adtalem Global Education. So you may wish to see this free collection of other companies that have reasonable P/E ratios and have grown earnings strongly.

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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.