Filed under: Business of sports, Economic data

There has been considerable debate about the role of momentum in sports. In a landmark study, Thomas Gilovich and several colleagues provided evidence that the “hot hand” in basketball was nothing more than a myth. Since then, there has been considerable research suggesting that many of the old saws about sports are untrue, and a movement toward more enlightened analysis has emerged, best exemplified in Michael Lewis’ book Moneyball.

In this weekend’s Wall Street Journal, Allen St. John wonders about the idea of “momentum” heading into baseball’s post-season.

He writes that “while much is often made about late-season momentum as a harbinger of playoff success, in reality the relationship between the two is small… The playoffs are truly a second season. Only once since the advent of the wild card has the team with the best regular-season mark (the 1998 Yankees) won the World Series.”

So if your favorite team has limped into the post-season, don’t worry about it! Occasionally, there are legitimate reasons to fret over lost momentum. If a team has experienced a disastrous September because of injuries to its top starters, that will be a problem heading into the post-season — not because of momentum, but because the pitchers are likely to remain unavailable!

I would argue that investors should look at the stock market the same way. Rather than buying into the idea of “momentum” in the stock market (I’ve seen no evidence that such a phenomenon really exists), think about factors that actually effect the business. Leave the cliches about “fighting the tape” and “moving averages” to the old wives.

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This entry was posted on Sunday, September 30th, 2007 at 7:48 pm and is filed under Stocks Money News. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.