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
Most investors vastly overestimate financial bubble frequency, but Yale research spanning three centuries reveals they occur in under 0.5% of market periods. Here's why crash fears damage wealth more than crashes themselves and what history teaches about staying invested during market booms.
Robin Powell
Sep 16, 202510 min read
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