operating margin

operating margin

The financial ratio that professional investors focus on more than any other is operating margin, or operating income ÷ revenue.

The major categories of expenses subtracted from revenue to get to operating income are:  direct costs of creating a product/service (cost of materials, wages, power, water…) plus depreciation and SG&A (sales, general and administrative) expenses.  SG&A includes things like the cost of top management, sales force and corporate headquarters.

the higher, the better?

Most people assume that the higher the operating margin is, the more attractive a company is as an investment.  The idea is that the company in question must have spectacular offerings to be able to charge high prices that exceed the cost of creating them by a lot.  But that’s only true in very specific circumstances.

value and sustainability

The two big questions are whether current high margins are valuable and whether they are sustainable.


The first point sounds weird but is actually an important special case.  Some companies (think:  fine jewelry or furniture) have high margins–high profits on each sale–because to do business they have to maintain large inventories that don’t turn over very frequently.  Unlike candy in the checkout aisle, where the starting inventory may be sold several times a day, it may take six months or longer to sell a brooch or a sofa that’s on the showroom floor.  So, yes, the margins are high.  But a good part of that is to compensate for the expense of holding inventory (not such a concern in a 0% interest rate world) and the risk that items may go out of style (or never have been in style) before they’re sold.


Most of the time, however, sustainability is the key issue.  That’s because high margins draw competition.  Personally, I think very high margins are never sustainable forever.  So for me the question is how quickly, and how publicly, they’ll be eroded.  I’m willing to believe that there’s an enduring  value to intellectual property like patents.  So I’m happy to buy tech companies.  There’s also a value to intangibles, like a strong brand name, an efficient distribution network and good customer service.  However, intangibles are not the no-brainer it used to be.  The internet has eroded that value badly from what it was twenty years ago–much to the consternation of people like Warren Buffett, whose career was built on his superior understanding of intangibles.

In any event, the holder of high-margin firms has to be alert to possible threats to the franchise.  Often the threat comes in the form of what are initially thought to be inferior products.  The $3000 PC replaced the $100,000 mini-computer, not because the former was better than the latter but because you could get 30 of them and make do for less than a single machine from DEC.  Same thing with mp3 players vs. stereos.  The sound is inferior but the machines are cheaper and portable.

the beauty of low margins


Again, personally, I find myself attracted to distribution companies, which have high operating income despite low operating income margins, because they have high inventory turnover.  The ones I find most compelling send to sell a product long before they have to pay their supplier for it.  Also, they’re badly understood by devotees of high margins.

broken companies

A final note:  value investors begin to salivate when they find a firm with much lower margins than is the norm for the industry.  Typically, the stock will be very cheap and, they believe, it’s just a matter of time before either the board of directors takes corrective action or the company is taken over.  Normally not my cup of tea but I’ll dabble on occasion.

4 responses

  1. Thanks for your question. I haven’t looked at eBay for years. If it’s correct that the company has gone ex-growth, the most important investment issue is whether the stock market has pummeled it more than is justified. That’s normally what happens, giving value investors an opportunity to buy. In this case, I don’t know. I also know I have no flair for value investing, so my opinion, if I had one, wouldn’t be worth very much.

    • well it was your comment on distribution companies and how they are valued.

      On both Whole Foods and Ebay, but consumer facing companies, I don’t think the problem is really their market or ability to grow it. I think it is management and ability to execute.

      On the WFM sides the 365 stores are not turning out well. Falling into the classic trap of having two brands as you’ve talked about. Product selection bad. Need more beer/wine sales. Again execution.

      On ebay, yes they have a problem in that rich people tend to go with amazon. That said, I think after dropping paypal they are a lot more focused on growing the operations. The opportunity to create markets is large.

      (Example — ebay motors is widely considered by car people as the place to dump cars that can’t be sold elsewhere b/c of issues. Can that experience be improved? absolutely)

      But yes probably more of a value investor question than a growth question.

      *My WFM market thesis is as millennials have babies, they are getting more concerned about health and quality of food. My sister, for example, although she drives a land rover derides Whole Foods as Whole Paycheck. I think it more her republican leaning husband that is moving that. None the less she is insisting on buying quinoa mac and cheese for her two year old at $4 a box. (vs. 99 for the WFM store brand, or about .89 for Kraft)

  2. Pingback: What stocks to invest in = operating margin « PRACTICAL STOCK INVESTING | Stock Investing

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