Most people might just as well buy a share of the whole market, which pools all the information, than delude themselves into thinking they know something the market doesn't.

Macroeconomics: A Neoclassical Introduction. ; R. Miller (1991).

He shared the Nobel Memorial Prize in Economic Sciences in 1990 along with Harry Markowitz and William Sharpe. Miller spent most of his academic career at the University of Chicago's Booth School of Business.