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
If you're looking for an edge as an investor, you're not alone. Many people spend their time chasing the latest stock tip or trying to time the market. But what really sets successful investors apart is not secret information or complicated strategies. It is the ability to manage their own behaviour, especially in times of uncertainty. Your investment choices do matter. But the decisions you make about when to act, when to stay patient, and how to respond to market movements
Robin Powell
Feb 24, 20254 min read
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