It's not a stretch to say that ONEOK, Inc.'s (NYSE:OKE) price-to-earnings (or "P/E") ratio of 17.6x 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.

Recent times have been pleasing for ONEOK as its earnings have risen in spite of the market's earnings going into reverse. One possibility is that the P/E is moderate because investors think the company's earnings will be less resilient moving forward. 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.

Is There Some Growth For ONEOK?

The only time you'd be comfortable seeing a P/E like ONEOK's is when the company's growth is tracking the market closely.

Taking a look back first, we see that the company grew earnings per share by an impressive 43% last year. Pleasingly, EPS has also lifted 221% in aggregate from three years ago, thanks to the last 12 months of growth. Therefore, it's fair to say the earnings growth recently has been superb for the company.

Shifting to the future, estimates from the ten analysts covering the company suggest earnings should grow by 2.2% per annum over the next three years. That's shaping up to be materially lower than the 11% per year growth forecast for the broader market.

With this information, we find it interesting that ONEOK is trading at a fairly similar P/E to the market. Apparently many investors in the company are less bearish than analysts indicate and aren't willing to let go of their stock right now. Maintaining these prices will be difficult to achieve as this level of earnings growth is likely to weigh down the shares eventually.

The Final Word

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 ONEOK currently trades on a higher than expected P/E since its forecast growth is lower than the wider market. When we see a weak earnings outlook with slower than market growth, we suspect the share price is at risk of declining, sending the moderate P/E lower. Unless these conditions improve, it's challenging to accept these prices as being reasonable.

You always need to take note of risks, for example - ONEOK has 3 warning signs we think you should be aware of.

You might be able to find a better investment than ONEOK. If you want a selection of possible candidates, check out this free list of interesting companies that trade on a low P/E (but have proven they can grow earnings).

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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.