Even Cliff Asness believes in it. The boss of quantitative hedge fund AQR Capital Management, who studied under Eugene Fama at the University of Chicago, says he is still “respectfully scared” of the legend of efficient markets thinking when he asserts that alpha exists. “It does. But it’s rarer than people seem to think.”
Behavioural aspects to investing are much more widely discussed in professional circles these days than just a few years ago thanks to the growing number of economists and writers who study the less rational actions of market participation. Human biases impact on investment decisions and they are no longer considered soft issues by market researchers. Herding and market bubbles, for instance, and their link with funds manager momentum strategies exist because of consistently irrational behaviour.
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