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# Why Sydney Airport Limited's (ASX:SYD) High P/E Ratio Isn't Necessarily A Bad Thing

This article is written for those who want to get better at using price to earnings ratios (P/E ratios). We'll show how you can use Sydney Airport Limited's (ASX:SYD) P/E ratio to inform your assessment of the investment opportunity. Based on the last twelve months, Sydney Airport's P/E ratio is 45.36. In other words, at today's prices, investors are paying A\$45.36 for every A\$1 in prior year profit.

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

The formula for P/E is:

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

Or for Sydney Airport:

P/E of 45.36 = A\$8.01 Ã· A\$0.18 (Based on the year to June 2019.)

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

A higher P/E ratio means that buyers have to pay a higher price for each A\$1 the company has earned over the last year. That isn't necessarily good or bad, but a high P/E implies relatively high expectations of what a company can achieve in the future.

### How Does Sydney Airport's P/E Ratio Compare To Its Peers?

We can get an indication of market expectations by looking at the P/E ratio. You can see in the image below that the average P/E (22.8) for companies in the infrastructure industry is lower than Sydney Airport's P/E.

Sydney Airport's P/E tells us that market participants think the company will perform better than its industry peers, going forward. Clearly the market expects growth, but it isn't guaranteed. So further research is always essential. I often monitor director buying and selling.

### 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. When earnings grow, the 'E' increases, over time. Therefore, even if you pay a high multiple of earnings now, that multiple will become lower in the future. And as that P/E ratio drops, the company will look cheap, unless its share price increases.

Sydney Airport increased earnings per share by an impressive 11% over the last twelve months. And it has bolstered its earnings per share by 33% per year over the last five years. This could arguably justify a relatively high P/E ratio.

### A Limitation: P/E Ratios Ignore Debt and Cash In The Bank

One drawback of using a P/E ratio is that it considers market capitalization, but not the balance sheet. Thus, the metric does not reflect cash or debt held by the company. Hypothetically, a company could reduce its future P/E ratio by spending its cash (or taking on debt) to achieve higher earnings.

Spending on growth might be good or bad a few years later, but the point is that the P/E ratio does not account for the option (or lack thereof).

### How Does Sydney Airport's Debt Impact Its P/E Ratio?

Net debt totals 56% of Sydney Airport's market cap. If you want to compare its P/E ratio to other companies, you should absolutely keep in mind it has significant borrowings.

### The Verdict On Sydney Airport's P/E Ratio

Sydney Airport has a P/E of 45.4. That's higher than the average in its market, which is 18.2. While the meaningful level of debt does limit its options, it has achieved solid growth over the last year. It seems the market believes growth will continue, judging by the P/E ratio.

When the market is wrong about a stock, it gives savvy investors an opportunity. If the reality for a company is better than it expects, you can make money by buying and holding for the long term. So this free report on the analyst consensus forecasts could help you make a master move on this stock.

You might be able to find a better buy than Sydney Airport. If you want a selection of possible winners, check out this free list of interesting companies that trade on a P/E below 20 (but have proven they can grow earnings).

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.