With a price-to-earnings (or "P/E") ratio of 17x Owens Corning (NYSE:OC) may be sending bullish signals at the moment, given that almost half of all companies in the United States have P/E ratios greater than 20x and even P/E's higher than 36x are not unusual. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's limited.

While the market has experienced earnings growth lately, Owens Corning's earnings have gone into reverse gear, which is not great. It seems that many are expecting the dour earnings performance to persist, which has repressed the P/E. If you still like the company, you'd be hoping this isn't the case so that you could potentially pick up some stock while it's out of favour.

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Does Growth Match The Low P/E?

In order to justify its P/E ratio, Owens Corning would need to produce sluggish growth that's trailing the market.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 9.2%. This has soured the latest three-year period, which nevertheless managed to deliver a decent 27% overall rise in EPS. So we can start by confirming that the company has generally done a good job of growing earnings over that time, even though it had some hiccups along the way.

Shifting to the future, estimates from the analysts covering the company suggest earnings should grow by 30% over the next year. Meanwhile, the rest of the market is forecast to only expand by 15%, which is noticeably less attractive.

With this information, we find it odd that Owens Corning is trading at a P/E lower than the market. Apparently some shareholders are doubtful of the forecasts and have been accepting significantly lower selling prices.

The Key Takeaway

While the price-to-earnings ratio shouldn't be the defining factor in whether you buy a stock or not, it's quite a capable barometer of earnings expectations.

We've established that Owens Corning currently trades on a much lower than expected P/E since its forecast growth is higher than the wider market. There could be some major unobserved threats to earnings preventing the P/E ratio from matching the positive outlook. At least price risks look to be very low, but investors seem to think future earnings could see a lot of volatility.

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

Of course, you might also be able to find a better stock than Owens Corning. 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.