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
Y TREE's analysis of 550 portfolios found that 84 per cent of wealth managers underperformed in 2025. Wealth management underperformance cost investors up to a third of their expected returns — and most don't even know it's happening.
Robin Powell
Apr 710 min read
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