Clean Harbors, Inc.'s (NYSE:CLH) price-to-earnings (or "P/E") ratio of 33.3x might make it look like a strong sell right now compared to the market in the United States, where around half of the companies have P/E ratios below 18x and even P/E's below 10x are quite common. Nonetheless, we'd need to dig a little deeper to determine if there is a rational basis for the highly elevated P/E.

The recently shrinking earnings for Clean Harbors have been in line with the market. It might be that many expect the company's earnings to strengthen positively despite the tough market conditions, which has kept the P/E from falling. If not, then existing shareholders may be a little nervous about the viability of the share price.

If you'd like to see what analysts are forecasting going forward, you should check out our free report on Clean Harbors.

Is There Enough Growth For Clean Harbors?

The only time you'd be truly comfortable seeing a P/E as steep as Clean Harbors' is when the company's growth is on track to outshine the market decidedly.

Retrospectively, the last year delivered a frustrating 3.2% decrease to the company's bottom line. However, a few very strong years before that means that it was still able to grow EPS by an impressive 118% in total over the last three years. Although it's been a bumpy ride, it's still fair to say the earnings growth recently has been more than adequate for the company.

Shifting to the future, estimates from the eleven analysts covering the company suggest earnings should grow by 14% per year over the next three years. That's shaping up to be materially higher than the 10% per year growth forecast for the broader market.

In light of this, it's understandable that Clean Harbors' P/E sits above the majority of other companies. Apparently shareholders aren't keen to offload something that is potentially eyeing a more prosperous future.

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.

As we suspected, our examination of Clean Harbors' analyst forecasts revealed that its superior earnings outlook is contributing to its high P/E. At this stage investors feel the potential for a deterioration in earnings isn't great enough to justify a lower P/E ratio. Unless these conditions change, they will continue to provide strong support to the share price.

You always need to take note of risks, for example - Clean Harbors has 2 warning signs we think you should be aware of.

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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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.