Perseus Mining Limited's (ASX:PRU) price-to-earnings (or "P/E") ratio of 8.7x might make it look like a strong buy right now compared to the market in Australia, where around half of the companies have P/E ratios above 19x and even P/E's above 34x 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.

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Perseus Mining certainly has been doing a good job lately as it's been growing earnings more 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.

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Is There Any Growth For Perseus Mining?

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

Taking a look back first, we see that the company managed to grow earnings per share by a handy 14% last year. Pleasingly, EPS has also lifted 132% in aggregate from three years ago, partly thanks to the last 12 months of growth. So we can start by confirming that the company has done a great job of growing earnings over that time.

Shifting to the future, estimates from the six analysts covering the company suggest earnings growth is heading into negative territory, declining 2.6% per annum over the next three years. Meanwhile, the broader market is forecast to expand by 15% each year, which paints a poor picture.

In light of this, it's understandable that Perseus Mining'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. There's potential for the P/E to fall to even lower levels if the company doesn't improve its profitability.

The Key Takeaway

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.

As we suspected, our examination of Perseus Mining's analyst forecasts revealed that its outlook for shrinking earnings is contributing to its low P/E. Right now shareholders are accepting the low P/E as they concede future earnings probably won't provide any pleasant surprises. Unless these conditions improve, they will continue to form a barrier for the share price around these levels.

A lot of potential risks can sit within a company's balance sheet. You can assess many of the main risks through our free balance sheet analysis for Perseus Mining with six simple checks.

If P/E ratios interest you, you may wish to see this free collection of other companies with strong earnings growth and low P/E ratios.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.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.