Nucor Corporation's (NYSE:NUE) price-to-earnings (or "P/E") ratio of 8.2x might make it look like a strong 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. However, the P/E might be quite low for a reason and it requires further investigation to determine if it's justified.

Nucor has been struggling lately as its earnings have declined faster than most other companies. The P/E is probably low because investors think this poor earnings performance isn't going to improve at all. You'd much rather the company wasn't bleeding earnings if you still believe in the business. If not, then existing shareholders will probably struggle to get excited about the future direction of the share price.

See our latest analysis for Nucor

Is There Any Growth For Nucor?

Nucor's P/E ratio would be typical for a company that's expected to deliver very poor growth or even falling earnings, and importantly, perform much worse than the market.

Taking a look back first, the company's earnings per share growth last year wasn't something to get excited about as it posted a disappointing decline of 38%. Still, the latest three year period has seen an excellent 1,335% overall rise in EPS, in spite of its unsatisfying short-term performance. Although it's been a bumpy ride, it's still fair to say the earnings growth recently has been more than adequate for the company.

Shifting to the future, estimates from the twelve analysts covering the company suggest earnings growth is heading into negative territory, declining 28% over the next year. Meanwhile, the broader market is forecast to expand by 10%, which paints a poor picture.

In light of this, it's understandable that Nucor's P/E would sit below the majority of other companies. However, shrinking earnings are unlikely to lead to a stable P/E over the longer term. Even just maintaining these prices could be difficult to achieve as the weak outlook is weighing down the shares.

What We Can Learn From Nucor's P/E?

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.

As we suspected, our examination of Nucor's analyst forecasts revealed that its outlook for shrinking earnings is contributing to its low P/E. At this stage investors feel the potential for an improvement in earnings isn't great enough to justify a higher P/E ratio. It's hard to see the share price rising strongly in the near future under these circumstances.

Before you take the next step, you should know about the 2 warning signs for Nucor (1 is a bit concerning!) that we have uncovered.

If these risks are making you reconsider your opinion on Nucor, explore our interactive list of high quality stocks to get an idea of what else is out there.

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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.