How much of your portfolio should be in stocks? It's one of investing's most important questions — and the standard answer is costing the average investor the equivalent of 2% of their lifetime consumption. Yale economists have finally built something better, and it fits in a spreadsheet.
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
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