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Should You Buy Pfizer Inc (NYSE:PFE) At This PE Ratio?

James Harlett

Pfizer Inc (NYSE:PFE) is trading with a trailing P/E of 9.9x, which is lower than the industry average of 24x. Although some investors may jump to the conclusion that this is a great buying opportunity, understanding the assumptions behind the P/E ratio might change your mind. Today, I will explain what the P/E ratio is as well as what you should look out for when using it. Check out our latest analysis for Pfizer

Demystifying the P/E ratio

NYSE:PFE PE PEG Gauge Jun 20th 18

A common ratio used for relative valuation is the P/E ratio. It compares a stock’s price per share to the stock’s earnings per share. A more intuitive way of understanding the P/E ratio is to think of it as how much investors are paying for each dollar of the company’s earnings.

P/E Calculation for PFE

Price-Earnings Ratio = Price per share ÷ Earnings per share

PFE Price-Earnings Ratio = $36.16 ÷ $3.65 = 9.9x

The P/E ratio itself doesn’t tell you a lot; however, it becomes very insightful when you compare it with other similar companies. Our goal is to compare the stock’s P/E ratio to the average of companies that have similar attributes to PFE, such as company lifetime and products sold. A quick method of creating a peer group is to use companies in the same industry, which is what I will do. Since PFE’s P/E of 9.9x is lower than its industry peers (24x), it means that investors are paying less than they should for each dollar of PFE’s earnings. Therefore, according to this analysis, PFE is an under-priced stock.

A few caveats

While our conclusion might prompt you to buy PFE immediately, there are two important assumptions you should be aware of. The first is that our “similar companies” are actually similar to PFE, or else the difference in P/E might be a result of other factors. For example, if you compared lower risk firms with PFE, then investors would naturally value it at a lower price since it is a riskier investment. The second assumption that must hold true is that the stocks we are comparing PFE to are fairly valued by the market. If this does not hold true, PFE’s lower P/E ratio may be because firms in our peer group are overvalued by the market.

What this means for you:

Since you may have already conducted your due diligence on PFE, the undervaluation of the stock may mean it is a good time to top up on your current holdings. But at the end of the day, keep in mind that relative valuation relies heavily on critical assumptions I’ve outlined above. Remember that basing your investment decision off one metric alone is certainly not sufficient. There are many things I have not taken into account in this article and the PE ratio is very one-dimensional. If you have not done so already, I urge you to complete your research by taking a look at the following:

  1. Future Outlook: What are well-informed industry analysts predicting for PFE’s future growth? Take a look at our free research report of analyst consensus for PFE’s outlook.
  2. Past Track Record: Has PFE been consistently performing well irrespective of the ups and downs in the market? Go into more detail in the past performance analysis and take a look at the free visual representations of PFE’s historicals for more clarity.
  3. Other High-Performing Stocks: Are there other stocks that provide better prospects with proven track records? Explore our free list of these great stocks here.


To help readers see pass the short term volatility of the financial market, we aim to bring you a long-term focused research analysis purely driven by fundamental data. Note that our analysis does not factor in the latest price sensitive company announcements.

The author is an independent contributor and at the time of publication had no position in the stocks mentioned.