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.
With the Magnificent Seven dominating the S&P 500, concentration risk is at historic highs. Here's why portfolio diversification remains your best defence.
Robin Powell
Dec 1, 20258 min read
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