With a median price-to-earnings (or "P/E") ratio of close to 19x in the United States, you could be forgiven for feeling indifferent about National Presto Industries, Inc.'s (NYSE:NPK) P/E ratio of 18.6x. While this might not raise any eyebrows, if the P/E ratio is not justified investors could be missing out on a potential opportunity or ignoring looming disappointment.

National Presto Industries has been doing a good job lately as it's been growing earnings at a solid pace. It might be that many expect the respectable earnings performance to wane, which has kept the P/E from rising. 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.

We don't have analyst forecasts, but you can see how recent trends are setting up the company for the future by checking out our free report on National Presto Industries' earnings, revenue and cash flow.

How Is National Presto Industries' Growth Trending?

National Presto Industries' P/E ratio would be typical for a company that's only expected to deliver moderate growth, and importantly, perform in line with the market.

Taking a look back first, we see that the company managed to grow earnings per share by a handy 14% last year. The latest three year period has also seen an excellent 76% overall rise in EPS, aided somewhat by its short-term performance. So we can start by confirming that the company has done a great job of growing earnings over that time.

Comparing that to the market, which is only predicted to deliver 16% growth in the next 12 months, the company's momentum is stronger based on recent medium-term annualised earnings results.

With this information, we find it interesting that National Presto Industries is trading at a fairly similar P/E to the market. It may be that most investors are not convinced the company can maintain its recent growth rates.

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 National Presto Industries currently trades on a lower than expected P/E since its recent three-year growth is higher than the wider market forecast. There could be some unobserved threats to earnings preventing the P/E ratio from matching this positive performance. It appears some are indeed anticipating earnings instability, because the persistence of these recent medium-term conditions would normally provide a boost to the share price.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 2 warning signs with National Presto Industries, and understanding them should be part of your investment process.

You might be able to find a better investment than National Presto Industries.

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.