Unum Group's (NYSE:UNM) price-to-earnings (or "P/E") ratio of 7.8x 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 18x and even P/E's above 33x are quite common. Although, it's not wise to just take the P/E at face value as there may be an explanation why it's so limited.

Unum Group has been struggling lately as its earnings have declined faster than most other companies. It seems that many are expecting the dismal earnings performance to persist, which has repressed the P/E. If you still like the company, you'd want its earnings trajectory to turn around before making any decisions. Or at the very least, you'd be hoping the earnings slide doesn't get any worse if your plan is to pick up some stock while it's out of favour.

Want the full picture on analyst estimates for the company? Then our free report on Unum Group will help you uncover what's on the horizon.

What Are Growth Metrics Telling Us About The Low P/E?

The only time you'd be truly comfortable seeing a P/E as depressed as Unum Group's is when the company's growth is on track to lag the market decidedly.

If we review the last year of earnings, dishearteningly the company's profits fell to the tune of 13%. Still, the latest three year period has seen an excellent 106% overall rise in EPS, in spite of its unsatisfying short-term performance. Accordingly, while they would have preferred to keep the run going, shareholders would probably welcome the medium-term rates of earnings growth.

Shifting to the future, estimates from the ten analysts covering the company suggest earnings should grow by 13% each year over the next three years. That's shaping up to be materially higher than the 10% per year growth forecast for the broader market.

In light of this, it's peculiar that Unum Group's P/E sits below the majority of other companies. It looks like most investors are not convinced at all that the company can achieve future growth expectations.

The Final Word

Typically, we'd caution against reading too much into price-to-earnings ratios when settling on investment decisions, though it can reveal plenty about what other market participants think about the company.

Our examination of Unum Group's analyst forecasts revealed that its superior earnings outlook isn't contributing to its P/E anywhere near as much as we would have predicted. When we see a strong earnings outlook with faster-than-market growth, we assume potential risks are what might be placing significant pressure on the P/E ratio. At least price risks look to be very low, but investors seem to think future earnings could see a lot of volatility.

And what about other risks? Every company has them, and we've spotted 1 warning sign for Unum Group you should know about.

If you're unsure about the strength of Unum Group's business, why not explore our interactive list of stocks with solid business fundamentals for some other companies you may have missed.

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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.