
When 32 market timing newsletters were compared to the S&P 500 Index over a 10-year period, not one of them bested the broad market index. The primary reason for this inability to time the market is the high concentration of returns and losses that occur each year in just a few days. In a recent 10-year period, 100% of the total stock market gain occurred over just 20 days. It is impossible to predict such short periods in advance. Professors studied 15,000 predictions by 237 market timers and concluded that, "There is no evidence that [market timing] newsletters can time the market."
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The conclusion of this 51 page (see page 25) analysis could not have been stated more clearly. "There is no evidence that newsletters can time the market. Consistent with mutual fund studies, 'winners' rarely win again and 'losers' often lose again." This clearly indicates that the market’s signals are inaudible to the thousands of time pickers claiming to clearly hear them. Any investment professional who speculates on the market’s future should be relegated to the fortune telling parlor. The three charts below show the following: first, the predictive value of market-timing newsletter forecasts is equal to the flip of a coin; second, over the period studied, the average performance of the newsletters seriously lagged a simple market index; third, the number of newsletters that delivered a higher return than the market was disappointingly small.
F-4A
Jeffrey
Lauderman wrote a BusinessWeek article titled Market Timing: A Perilous Ploy, dispelling the myth of market timing,
which he called a guessing game. His 1998 analysis
included an interview with Mark Hulbert, who monitors the time pickers
recommendations. Hulbert's conclusion provided a knockout blow to all
25 newsletters he tracked. None of the newsletter timers beat the market. For the 10 year period ending 1988 to 1997, the time pickers' average
return was 11.06% annually, while the S&P 500 stock index earned 18.06%
annually and the Wilshire 5000 earned 17.57% annually.
The figure below
tells the story.

"If I have noticed anything over these 60 years on Wall Street, it is that people do not succeed in forecasting what's going to happen to the stock market."

"Market Timing is a wicked idea. Don't try it --- ever." and "Contrary to their oft articulated goal of outperforming the market averages, investment managers are not beating the market: The market is beating them." - The Loser's Game, 1975.

"Hulbert's conclusion: None of the newsletter timers beat the market [over a ten year period]. The average return was 11.06%. During the same period, the Standard & Poor's 500-stock index earned 18.06% annually..."

"There are two kinds of investors, be they large or small: those who don't know where the market is headed, and those who don't know that they don't know. Then again, there is a third type of investor - the investment professional, who indeed knows that he or she doesn't know, but whose livelihood depends upon appearing to know. "

"Statistical research has shown that, to a close approximation, stock prices seem to follow a random walk with no discernible predictable patterns that investors can exploit. Such findings are now taken to be evidence of market efficiency, that is, evidence that market prices reflect all currently available information. Only new information will move stock prices, and this information is equally likely to be good or bad news."

"O Fortuna! Like the moon ever-changing, rising first then declining."

"It is always the right time to invest the right way. The right time to get in the market is when you have money to invest, and the right time to get out of the market is when you need the money. Just make sure that when you invest, your risk exposure matches your Risk Capacity™."

"October is one of the peculiarly dangerous months to speculate in stocks. The others are July, January, September, April, November, May, March, June, December, August and February."

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