With a price-to-earnings (or "P/E") ratio of 50.8x Quanta Services, Inc. (NYSE:PWR) may be sending very bearish signals at the moment, given that almost half of all companies in the United States have P/E ratios under 17x and even P/E's lower than 9x are not unusual. However, the P/E might be quite high for a reason and it requires further investigation to determine if it's justified.

Recent times have been pleasing for Quanta Services as its earnings have risen in spite of the market's earnings going into reverse. 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. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

How Is Quanta Services' Growth Trending?

Quanta Services' P/E ratio would be typical for a company that's expected to deliver very strong growth, and importantly, perform much better than the market.

If we review the last year of earnings growth, the company posted a terrific increase of 50%. The latest three year period has also seen an excellent 62% overall rise in EPS, aided by its short-term performance. Therefore, it's fair to say the earnings growth recently has been superb for the company.

Turning to the outlook, the next three years should generate growth of 19% per annum as estimated by the analysts watching the company. With the market only predicted to deliver 10% each year, the company is positioned for a stronger earnings result.

With this information, we can see why Quanta Services is trading at such a high P/E compared to the market. Apparently shareholders aren't keen to offload something that is potentially eyeing a more prosperous future.

The Key Takeaway

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.

We've established that Quanta Services maintains its high P/E on the strength of its forecast growth being higher than the wider market, as expected. At this stage investors feel the potential for a deterioration in earnings isn't great enough to justify a lower P/E ratio. It's hard to see the share price falling strongly in the near future under these circumstances.

And what about other risks? Every company has them, and we've spotted 2 warning signs for Quanta Services you should know about.

Of course, you might also be able to find a better stock than Quanta Services. 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.