Muaz Halees
Roger Lowenstein has recently declared that “the upside of the current Great Recession is that it could drive a stake through the heart of the academic nostrum known as the efficient-market hypothesis (EMH).”
Is this true? Who knows.
The efficient market hypothesis has become the “mark-to-market” of opponents to stock market regulators. Just as accountants claim that the mark-to-market rule has been the cause of undervalued assets, Justin Fox and his brethren have claimed that the EMH have caused the current recession

Justin Fox writes The Curious Capitalist column for Time Magazine, which, surprisingly, is not about a sexually confused economist. His columns are very detailed, educational, and grounded in economic theory. It comes as no surprise that his book reads like an extended column—which is both praise and condemnation.
He imparts two very clear lessons—both of which are so simplistic that calling them lessons may well be offensive to schools. His first claim is that “the markets are smarter than you are” and his second is that “the majority of fund managers fail to accurately judge the market and actually reduce the chance of an investor to turn a profit.” Some of his claims that didn’t make it into the book were that grass is green, that the sun is hot. Groundbreaking stuff, I know.
Fox begins his extended column with the story of economist Irving Fischer in 1929. He then ties the stories and stances of old-world economists to those of their contemporaries. He also develops his second hypothesis by highlighting the numerous economists over the years that made similar claims.
Fox builds his book around the inception and maturation of EMH. He takes the reader from its position as hypothesis, to its position as fact, to what he claims it should be—myth. His easy-to-read and at times intolerably bland account of the rise and fall of the EMH ends in a profound and powerful assertion: How can a theory that asserts all market prices and movements are unknowable in the present be used to determine the market’s present day prices and movements?
Fox’s book comes off as an attempt to pin the blame of the market’s recent crash to any number of factors. His claims that asset beta may be fraudulent and evil, economists knowingly gifted the public with flawed theories, and that the capital asset pricing model is increasingly irrelevant all lead to his contemptuous treatment of the efficient market hypothesis. While his words should not be taken as gospel, his book should make it into the library of anyone concerned with the machinations of the market.
One question that I was left with (which may bother you as well) is how can rationality ever be used in tandem with something as inherently irrational as the market?