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# Is Bouygues SA's (EPA:EN) P/E Ratio Really That Good?

The goal of this article is to teach you how to use price to earnings ratios (P/E ratios). We'll show how you can use Bouygues SA's (EPA:EN) P/E ratio to inform your assessment of the investment opportunity. Based on the last twelve months, Bouygues's P/E ratio is 11.06. That means that at current prices, buyers pay â‚¬11.06 for every â‚¬1 in trailing yearly profits.

See our latest analysis for Bouygues

### How Do I Calculate Bouygues's Price To Earnings Ratio?

The formula for price to earnings is:

Price to Earnings Ratio = Price per Share Ã· Earnings per Share (EPS)

Or for Bouygues:

P/E of 11.06 = â‚¬38.00 Ã· â‚¬3.44 (Based on the year to June 2019.)

### Is A High Price-to-Earnings Ratio Good?

The higher the P/E ratio, the higher the price tag of a business, relative to its trailing earnings. All else being equal, it's better to pay a low price -- but as Warren Buffett said, 'It's far better to buy a wonderful company at a fair price than a fair company at a wonderful price.

### Does Bouygues Have A Relatively High Or Low P/E For Its Industry?

One good way to get a quick read on what market participants expect of a company is to look at its P/E ratio. The image below shows that Bouygues has a lower P/E than the average (12.1) P/E for companies in the construction industry.

Bouygues's P/E tells us that market participants think it will not fare as well as its peers in the same industry. While current expectations are low, the stock could be undervalued if the situation is better than the market assumes. It is arguably worth checking if insiders are buying shares, because that might imply they believe the stock is undervalued.

### How Growth Rates Impact P/E Ratios

Generally speaking the rate of earnings growth has a profound impact on a company's P/E multiple. That's because companies that grow earnings per share quickly will rapidly increase the 'E' in the equation. And in that case, the P/E ratio itself will drop rather quickly. And as that P/E ratio drops, the company will look cheap, unless its share price increases.

It's great to see that Bouygues grew EPS by 11% in the last year. And earnings per share have improved by 41% annually, over the last three years. So one might expect an above average P/E ratio.

### Remember: P/E Ratios Don't Consider The Balance Sheet

One drawback of using a P/E ratio is that it considers market capitalization, but not the balance sheet. That means it doesn't take debt or cash into account. Theoretically, a business can improve its earnings (and produce a lower P/E in the future) by investing in growth. That means taking on debt (or spending its cash).

While growth expenditure doesn't always pay off, the point is that it is a good option to have; but one that the P/E ratio ignores.

### Bouygues's Balance Sheet

Net debt is 44% of Bouygues's market cap. While that's enough to warrant consideration, it doesn't really concern us.

### The Bottom Line On Bouygues's P/E Ratio

Bouygues's P/E is 11.1 which is below average (17.3) in the FR market. The company does have a little debt, and EPS growth was good last year. If the company can continue to grow earnings, then the current P/E may be unjustifiably low.

Investors should be looking to buy stocks that the market is wrong about. If the reality for a company is not as bad as the P/E ratio indicates, then the share price should increase as the market realizes this. So this free report on the analyst consensus forecasts could help you make a master move on this stock.

But note: Bouygues may not be the best stock to buy. So take a peek at this free list of interesting companies with strong recent earnings growth (and a P/E ratio below 20).

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned. Thank you for reading.