The goal of this article is to teach you how to use price to earnings ratios (P/E ratios). We'll look at The New Zealand Refining Company Limited's (NZSE:NZR) P/E ratio and reflect on what it tells us about the company's share price. Based on the last twelve months, New Zealand Refining's P/E ratio is 20.26. That is equivalent to an earnings yield of about 4.9%.
Check out our latest analysis for New Zealand Refining
How Do You Calculate A P/E Ratio?
The formula for price to earnings is:
Price to Earnings Ratio = Share Price ÷ Earnings per Share (EPS)
Or for New Zealand Refining:
P/E of 20.26 = NZ$1.88 ÷ NZ$0.09 (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 NZ$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 Does New Zealand Refining's P/E Ratio Compare To Its Peers?
The P/E ratio indicates whether the market has higher or lower expectations of a company. You can see in the image below that the average P/E (10.3) for companies in the oil and gas industry is lower than New Zealand Refining's P/E.
Its relatively high P/E ratio indicates that New Zealand Refining shareholders think it will perform better than other companies in its industry classification. Shareholders are clearly optimistic, but the future is always uncertain. So further research is always essential. I often monitor director buying and selling.
How Growth Rates Impact P/E Ratios
If earnings fall then in the future the 'E' will be lower. Therefore, even if you pay a low multiple of earnings now, that multiple will become higher in the future. A higher P/E should indicate the stock is expensive relative to others -- and that may encourage shareholders to sell.
New Zealand Refining saw earnings per share decrease by 28% last year. And it has shrunk its earnings per share by 33% per year over the last three years. This might lead to low expectations.
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. That means it doesn't take debt or cash into account. Hypothetically, a company could reduce its future P/E ratio by spending its cash (or taking on debt) to achieve higher earnings.
Such expenditure might be good or bad, in the long term, but the point here is that the balance sheet is not reflected by this ratio.