How Long Can Profit Margins Resist Gravity?

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In response to a question about where Apple's stock might head, analyst Horace Dediu remarked, "The stock price can be determined through a simple function: Take earnings and multiply it by a random number."

While that "random number" remains mysterious and hotly debated, at least a corporation's earnings can be defined through solid numbers. The worry now, however, is that earnings are at an all-time high and will begin to revert to the mean. And if earnings fall and that random number remains the same, then the stock price falls.

How long can earnings survive at their lofty levels?


In the past
Corporate profits have averaged 6.2% of GDP since 1947. Today, that number is 11%:

Some argue that the past average of profit margins doesn't matter because technological advancements have improved profitability and efficiency. For example, business software maker Oracle  touts its Hyperion Planning services, which helped medical-product maker ResMed: "The project successfully encouraged better regional sales techniques, by focusing on high-margin products and by providing profitability information on a product-by-product basis with continuous monitoring of performance." The ability of computers to stomp on the profit pedals just might have broken our ties to the historical mean.

On the other hand, many think the opposite. James Montier of GMO argued that government spending boosted corporate profits by 7.6%, and as the government spends less due to tighter budgets, profit margins will fall back to the historical average. He also noted that while government expenditures may remain high during the election year of 2012, they will likely fall in the following years. If his theory is true, the resulting fiscal cliff and debt ceiling compromises will be the end of elevated corporate profits.

John Hussman of the Hussman Funds had a more sarcastic take on historic profit margins. He concluded, "The upshot is that if investors are willing to believe (without the use of off-label hallucinogens) that current profit margins are the new normal, and will be sustained indefinitely, then Wall Street's valuations based on current and forward earnings estimates can be taken at face value."

In the future
Analysts definitely believe in the sustainability of profit margins. According to Yardeni Research (link opens PDF), profit margins for the S&P 500  sat at 9.9% at the beginning of 2013, with analysts expecting 10.6% in 2014. Analysts see a rise from already higher-than-normal corporate profit margins. And they might be right.

But it's also a good time to remind oneself that analysts always reach for the stars with their expectations. As one McKinsey study finds, "On average, analysts' forecasts have been almost 100 percent too high."

A company like Apple, with a profit margin of more than 20%, has been rumored to be making a low-cost version of the iPhone. And to attract buyers in the cheaper segment, Apple might sacrifice some of that margin, even if it profits from a lesser iPhone. Analysts have also reduced expectations for General Electric's earnings from $0.47 per share -- the consensus just a few months ago -- to $0.43 per share today. GE CEO Jeff Immelt has a goal of raising profit margins by 0.5% to 0.7% this year through a new focus on services based around its heavy equipment.

But timing is tough
Even if you believe that profit margins will return to a lower state, guessing when that will happen is the difficult part. One Goldman Sachs analyst presented what he thought was the end of high profit margins last January. Montier and Hussman wrote their claims in March. It might be true that the newly secure government will cut spending and hurt profit margins, but corporations are also great at lobbying for their interests.

Market timing of any sort is near-impossible. You can only do your best by focusing on stellar companies that you think have more value than the market realizes. That may be a high-margin player like Apple, a commodity business with profit margins in the low single digits, or even an upstart that has yet to make money.

Can GE meet its profit margin goal? The recent financial crisis struck a blow, but management took advantage of the market's dip to make strategic bets in energy. If you're a current or prospective GE investor, you need to understand how these bets could drive the company to become the world's infrastructure leader. At the same time, you need to be aware of the threats to GE's portfolio. To help, we're offering comprehensive coverage for investors in a premium report on General Electric, in which our industrials analyst breaks down GE's multiple businesses. You'll find reasons to buy or sell GE, and you'll receive continuing updates as major events unfold during the year. To get started, click here now.

The article How Long Can Profit Margins Resist Gravity? originally appeared on Fool.com.

Dan Newman has no position in any stocks mentioned. The Motley Fool recommends Apple and Goldman Sachs. The Motley Fool owns shares of Apple, General Electric Company, and Oracle. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

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