Market Cycle Math

So let's examine the stock market math for secular bull, range-bound, and bear markets. The following Exhibit 4 shows sources of price appreciation in past bull, range-bound, and bear markets.

Exhibit 4





During bull markets, a vibrant, peaceful combination of P/E expansion (a staple of bull markets, a great source of return) and earnings growth brings outsize returns to jubilant investors. Prolonged bull markets start with below - and end with above - average P/Es.



P/Es are some of the most mean-reverting creatures, and range-bound markets act as clean-up guys: they rid us of the mess (i.e., deflate high P/Es) caused by bull markets, taking them down towards and actually below the mean. P/E compression wipes out most if not all earnings growth, resulting in zero (or nearly) price appreciation plus dividends.



Bear markets are range-bound markets' cousins; they share half of their DNA: high starting valuations. However, where in cowardly lion markets economic growth helps to soften the blow caused by P/E compression, during secular bear markets the economy is not there to help. Economic blues (runaway inflation, severe deflation, subpar or negative economic or earnings growth) add oil to the fire (started by high valuations) and bring devastating returns to investors.

A true secular bear market has not really taken place in the U.S., but one has occurred in Japan. The market decline caused by the Great Depression, though referred to as the greatest decline in U.S. stocks in the 20th century, only lasted three years and thus doesn't really fit the traditional "secular" requirement of lasting more than five years.

Japan's Nikkei 225 suffered (see Exhibit 5) through a true secular bear market: stock prices declined over 80 percent from their 1989-1991 highs until they bottomed in 2003 (the market seems to be coming back now). For more than a decade the country struggled with deflation caused by its banking system coming to a near halt on the heels of a collapsing real estate market and the bad loans that came with it. Of course, all this took place on the heels of a huge bull market, and thus very high valuations.

Exhibit 5


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A unique aspect that contributed to the severity and longevity of the Japanese deflation was a cultural issue: the Japanese government intervened and didn't allow structurally defunct companies to go bankrupt, thus tampering with the nucleus of capitalism (and Darwinism as well), creative destruction.

I must admit, it seems that lately we've been importing a lot more from Japan than their cars and flat-screen TVs, as the U.S. government steps in to "fix" our troubled financial firms. (In the following articles I argue against government bailing out homeowners and against the Fed bailing out the economy).

Where Are We Today?

Today stocks may appear cheap at first glance, at least if you look at valuations of the late 1990s. They're not! To minimize the impact of cyclical profit volatility, let's first take a look at stock market historical and current valuations, based on 10-year trailing earnings, as shown in Exhibit 6. This way we capture a full economic cycle.

Exhibit 6


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The conclusions we can draw are:

• Secular bull markets end at P/Es much above average. The 1982-2000 bull market ended at the highest valuations ever!
• Secular range-bound markets ended when P/Es were below average.
• Markets spent very little time at what is known to be a "fairly valued" state of 15 times 12-month trailing earnings. Historically, stocks only saw average valuations on the way from one extreme to the other. From 1900 to 2006 the S&P 500 spent less than 27% of the time between P/Es of 13 and 17.
• Today, after eight years of plentiful volatility and no returns, what the WSJ called a "lost decade," stocks are not cheap. If you look at ten-year trailing earnings, they are still at levels where previous range-bound markets started. In other words, based on 10-year trailing earnings, stocks are still at 64% above their average stated valuations.

Now, if you look at historical valuations where P/Es are computed based on one-year trailing earnings (see Exhibit 7), the picture is not that exciting but less grim. At about 18 times trailing earnings, U.S. stocks don't appear that expensive.

Exhibit 7


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Unfortunately, the cheapness argument falls on its face once you realize that (pretax) profit margins are hovering at an all-time high of 11.5%, about 35% above their historical (since 1980) average of 8.5%. Similarly to P/Es, profit margins are extremely mean-reverting. As companies start to earn above-average economic profits, new competition waltzes in and competes these excess profits away - arrivederci fat profit margins.

Once this happens, the "E" in the "P/E" equation will decline as well, and P/Es will rise from 18 to 22. An additional point: as you see in Exhibit 8, margins don't have to revert and stop at the mean; historically they've gone below the mean - that is how the mean is created. (In the February 4th, 2008 issue of Barron's I rebuffed common arguments against profit-margin mean reversion.)

Exhibit 8


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As a side note: The bulk of excesses in overall profit margins, 54.5% to be exact (see Exhibit 9), were in "stuff" stocks (i.e., energy, materials, and industrials). Profit margins will deflate when the global economy slows down. This goes far beyond oil and commodities. Companies that make "stuff," which historically have been very cyclical (today is no different) have benefitted from tremendous operational leverage that contributed to considerable improvement in margins. However, leverage works both ways: lower sales and high fixed costs will push margins to the other extreme.

Exhibit 9


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Financials were responsible for 22% of the excess in margins, as they benefitted from tremendous liquidity hosed down by the Fed over recent years; now they are drowning in it. Their margins are compressing at a faster rate than you can read this.

Finally, the "new" economy stocks are responsible for 17% of the excess. However, I'd argue that these industries have transformed substantially since 1988, so that higher-margin software and services now account for a much larger portion of technology and telecom sales. It is kind of like Microsoft (ironically the "new" economy) vs. IBM in 1988: the hardware company (the old economy) vs. the new. Of course IBM of today is lot more of a software and service company than the hardware company it was in the 1980s. Thus the "new" economy stocks should have higher margins than they did in 1988, but by how much? I don't know, but they likely will face a lower margin compression than "stuff" and financials.

The bottom line: Remember those long-term double-digit returns you were promised by stock market gurus during the last bull market? Well, an average passive buy-and-hold investor will be lucky to have very low single-digit returns for the long term. In fact, during the last 1966-1982 range-bound market, investors received almost zero real total returns.