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# Should We Worry About Caltex Australia Limited's (ASX:CTX) P/E Ratio?

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This article is for investors who would like to improve their understanding of price to earnings ratios (P/E ratios). To keep it practical, we'll show how Caltex Australia Limited's (ASX:CTX) P/E ratio could help you assess the value on offer. Based on the last twelve months, Caltex Australia's P/E ratio is 12.16. That corresponds to an earnings yield of approximately 8.2%.

### How Do I Calculate A Price To Earnings Ratio?

The formula for P/E is:

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

Or for Caltex Australia:

P/E of 12.16 = A\$26.11 Ã· A\$2.15 (Based on the year to December 2018.)

### 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. 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.'

### 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. If earnings are growing quickly, then the 'E' in the equation will increase faster than it would otherwise. That means even if the current P/E is high, it will reduce over time if the share price stays flat. Then, a lower P/E should attract more buyers, pushing the share price up.

Caltex Australia's earnings per share fell by 9.5% in the last twelve months. But over the longer term (5 years) earnings per share have increased by 1.8%.

### How Does Caltex Australia's P/E Ratio Compare To Its Peers?

One good way to get a quick read on what market participants expect of a company is to look at its P/E ratio. You can see in the image below that the average P/E (7.3) for companies in the oil and gas industry is lower than Caltex Australia's P/E.

That means that the market expects Caltex Australia will outperform other companies in its industry. Shareholders are clearly optimistic, but the future is always uncertain. So further research is always essential. I often monitor director buying and selling.

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

Don't forget that the P/E ratio considers market capitalization. So it won't reflect the advantage of cash, or disadvantage of debt. Hypothetically, a company could reduce its future P/E ratio by spending its cash (or taking on debt) to achieve higher earnings.

Such spending might be good or bad, overall, but the key point here is that you need to look at debt to understand the P/E ratio in context.

### How Does Caltex Australia's Debt Impact Its P/E Ratio?

Net debt totals 15% of Caltex Australia's market cap. That's enough debt to impact the P/E ratio a little; so keep it in mind if you're comparing it to companies without debt.

### The Bottom Line On Caltex Australia's P/E Ratio

Caltex Australia has a P/E of 12.2. That's below the average in the AU market, which is 16.1. With only modest debt, it's likely the lack of EPS growth at least partially explains the pessimism implied by the P/E ratio.

Investors have an opportunity when market expectations about a stock are wrong. As value investor Benjamin Graham famously said, 'In the short run, the market is a voting machine but in the long run, it is a weighing machine.' So this free visualization of the analyst consensus on future earnings could help you make the right decision about whether to buy, sell, or hold.

Of course you might be able to find a better stock than Caltex Australia. So you may wish to see this free collection of other companies that have grown earnings strongly.

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.