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Hussman Weekly: The Siren's Song of the Half-Cycle

February 18, 2013

If there is one fatal siren’s song of investing, it is the belief that an unfinished half of the market cycle will remain unfinished. A typical, run-of-the-mill market cycle runs about 5 years in duration (though with a significant amount of individual variation). The typical bull market portion extends about 3.75 years, on average, during which time stocks advance at an annual rate of about 28%. The typical bear market portion extends about 1.25 years, on average, during which time stocks decline at an annual rate also about 28%. Historically, that puts the typical bull market gain at about 152% from trough-to-peak, followed by a bear market decline about 34% from peak-to-trough, for a cumulative full-cycle total return of about 67% (roughly 10.7% annualized). Taking the arithmetic average of past bull market declines (a slightly different calculation), the typical bear market comes in closer to a 32% decline. In any event, notice that even a run-of-the-mill bear market decline wipes out more than half of the preceding bull market advance. To put some perspective of where the market stands at present, and why the siren’s song of the half-cycle is so dangerous here, the chart below presents the S&P 500 since 1998. Notice in particular that the apparent performance of the market is strikingly different depending on the “lookback” that investors use. The 10-year lookback and the 4-year lookback are particularly misleading because each captures an unfinished half-cycle; essentially a trough-to-peak market move. Such lookbacks are useful only on the assumption that the preceding bear market periods were entirely avoided, and that the next one will be avoided as well. Otherwise, lookbacks with less heroic assumptions (e.g. peak-to-peak across market cycles) are more reasonable.


The chart above features two brackets. The first shows depicts a run-of-the-mill market decline of 32%, which is the historical average of how market cycles are completed. Such a decline would wipe out more than half of the recent bull market advance. The second bracket depicts a 39% bear market decline, which is the historical average for cyclical bear markets that take place within secular bear market periods.

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Rating: 3.0/5 (5 votes)


AlbertaSunwapta - 4 years ago    Report SPAM
In Canada in the past week or so I've seen on both the covers of; the Globe & Mail national newspaper and McLean's national magazine, headlines saying; 'Buy Stocks Now!' (Exact wording not available.)

I'm sitting on a good proportion of cash just waiting for Business Week to follow suit with a similar cover story so I'll know it's time to sell the rest. :-)
Paulwitt - 4 years ago    Report SPAM
I don't know if this is relevant but the chart shows the market at 900 in 1998 and 1500 in 2013. I figure that is about 3.5% annualized. I do admit however the market has been a bit choppy......LOL

Paulwitt - 4 years ago    Report SPAM
An interesting (fun) news item:

There is a 16 year old girl who is an actress, plays in a band, writes a blog, and day trades. I guess last year she made 30% and now I believe she is shorting a couple of stocks.

* I wonder what Warren thinks about this situation :)

AlbertaSunwapta - 4 years ago    Report SPAM
Warren Buffett's Favorite Valuation Metric Has Breached The 100% Level


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