Warnings that index funds have broken the stock market all imply a threshold: a share of the market at which price discovery fails. Nobody making the argument names it. Owen Lamont, writing in the Financial Analysts Journal, argues that no such number exists short of complete passive ownership, and that what actually determines whether prices stay informative is who is left doing the trading. His case, the strongest peer-reviewed research against it, and what the performance
Picture this: You're at dinner with friends, and someone excitedly announces their latest AI investing strategy—putting half their portfolio into artificial intelligence stocks. This scene plays out countless times, as the human brain sees AI's transformative potential and leaps to a seductive conclusion: concentrate everything on the obvious winner. History suggests this is precisely the wrong approach. Academic research demonstrates that concentrated investing carries dispr
TEBI
Aug 18, 20257 min read
SUBSCRIBE
Simply provide your email address to receive our regular update.
