RPC, Inc.'s (NYSE:RES) price-to-earnings (or "P/E") ratio of 10.1x might make it look like a buy right now compared to the market in the United States, where around half of the companies have P/E ratios above 17x and even P/E's above 32x are quite common. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's limited.

For instance, RPC's receding earnings in recent times would have to be some food for thought. It might be that many expect the disappointing earnings performance to continue or accelerate, which has repressed the P/E. 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 out of favour.

How Is RPC's Growth Trending?

There's an inherent assumption that a company should underperform the market for P/E ratios like RPC's to be considered reasonable.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 45%. Unfortunately, that's brought it right back to where it started three years ago with EPS growth being virtually non-existent overall during that time. Therefore, it's fair to say that earnings growth has been inconsistent recently for the company.

This is in contrast to the rest of the market, which is expected to grow by 12% over the next year, materially higher than the company's recent medium-term annualised growth rates.

With this information, we can see why RPC is trading at a P/E lower than the market. Apparently many shareholders weren't comfortable holding on to something they believe will continue to trail the bourse.

The Final Word

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.

We've established that RPC maintains its low P/E on the weakness of its recent three-year growth being lower than the wider market forecast, as expected. Right now shareholders are accepting the low P/E as they concede future earnings probably won't provide any pleasant surprises. If recent medium-term earnings trends continue, it's hard to see the share price rising 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 RPC you should know about.

It's important to make sure you look for a great company, not just the first idea you come across. So take a peek at this free list of interesting companies with strong recent earnings growth (and a low P/E).

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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.