United States Lime & Minerals, Inc.'s (NASDAQ:USLM) price-to-earnings (or "P/E") ratio of 22.2x might make it look like a sell right now compared to the market in the United States, where around half of the companies have P/E ratios below 16x and even P/E's below 9x are quite common. However, the P/E might be high for a reason and it requires further investigation to determine if it's justified.

With earnings growth that's exceedingly strong of late, United States Lime & Minerals has been doing very well. The P/E is probably high because investors think this strong earnings growth will be enough to outperform the broader market in the near future. You'd really hope so, otherwise you're paying a pretty hefty price for no particular reason.

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 United States Lime & Minerals' earnings, revenue and cash flow.

Does Growth Match The High P/E?

In order to justify its P/E ratio, United States Lime & Minerals would need to produce impressive growth in excess of the market.

Taking a look back first, we see that the company grew earnings per share by an impressive 64% last year. The latest three year period has also seen an excellent 160% overall rise in EPS, aided by its short-term performance. Accordingly, shareholders would have probably welcomed those medium-term rates of earnings growth.

This is in contrast to the rest of the market, which is expected to grow by 11% over the next year, materially lower than the company's recent medium-term annualised growth rates.

With this information, we can see why United States Lime & Minerals is trading at such a high P/E compared to the market. It seems most investors are expecting this strong growth to continue and are willing to pay more for the stock.

The Final Word

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 United States Lime & Minerals revealed its three-year earnings trends are contributing to its high P/E, given they look better than current market expectations. At this stage investors feel the potential for a deterioration in earnings isn't great enough to justify a lower P/E ratio. Unless the recent medium-term conditions change, they will continue to provide strong support to the share price.

It's always necessary to consider the ever-present spectre of investment risk. We've identified 1 warning sign with United States Lime & Minerals, and understanding should be part of your investment process.

Of course, you might find a fantastic investment by looking at a few good candidates. So take a peek at this free list of companies with a strong growth track record, trading on 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.