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How much passive investing is too much?

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

Robin Powell

AI can predict 71% of what your fund manager does

Most fund manager AI systems operate on autopilot, closely tracking the index while charging premium fees for active management. If your portfolio is essentially running itself, why are you paying someone to sit in the cockpit?

Robin Powell

Apr 209 min read

A man sits at a home desk working at a computer, with a laptop and desk lamp beside him — illustrating how retail investors are increasingly turning to AI tools to guide their financial decisions, unaware that those tools may be amplifying rather than correcting investor biases.

Does AI accentuate investor biases?

Investors are turning to AI hoping it will cut through the emotional noise and deliver clearer, more rational financial decisions. But two recent studies suggest these tools don't neutralise investor biases — they absorb them. And the more advanced the model, the worse the problem may get.

Robin Powell

Mar 107 min read

Woman on sofa using laptop to research AI investment advice — more than half of UK adults now use chatbots like ChatGPT for financial guidance

AI investment advice: What the chatbots get wrong

Consumer tests found ChatGPT scoring just 64% accuracy on financial questions. Accountants report clients losing real money. This Deep Dive examines what AI investment advice actually gets wrong — and what to do instead.

Robin Powell

Jan 2910 min read