W. R. Berkley Corporation's (NYSE:WRB) price-to-earnings (or "P/E") ratio of 15.4x 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 20x and even P/E's above 36x are quite common. However, the P/E might be low for a reason and it requires further investigation to determine if it's justified.

Recent times have been advantageous for W. R. Berkley as its earnings have been rising faster than most other companies. It might be that many expect the strong earnings performance to degrade substantially, which has repressed the P/E. If not, then existing shareholders have reason to be quite optimistic about the future direction of the share price.

How Is W. R. Berkley's Growth Trending?

W. R. Berkley's P/E ratio would be typical for a company that's only expected to deliver limited growth, and importantly, perform worse than the market.

Taking a look back first, we see that the company grew earnings per share by an impressive 18% last year. The strong recent performance means it was also able to grow EPS by 66% in total over the last three years. Accordingly, shareholders would have probably welcomed those medium-term rates of earnings growth.

Turning to the outlook, the next three years should generate growth of 2.5% per annum as estimated by the ten analysts watching the company. Meanwhile, the rest of the market is forecast to expand by 11% per annum, which is noticeably more attractive.

In light of this, it's understandable that W. R. Berkley's P/E sits below the majority of other companies. Apparently many shareholders weren't comfortable holding on while the company is potentially eyeing a less prosperous future.

The Final Word

We'd say the price-to-earnings ratio's power isn't primarily as a valuation instrument but rather to gauge current investor sentiment and future expectations.

As we suspected, our examination of W. R. Berkley's analyst forecasts revealed that its inferior earnings outlook 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. Unless these conditions improve, they will continue to form a barrier for the share price around these levels.

You always need to take note of risks, for example - W. R. Berkley has 1 warning sign we think you should be aware of.

If these risks are making you reconsider your opinion on W. R. Berkley, 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.