The S&P 500’s top 10 stocks now account for 40% of total market value, underscoring how concentrated the US equity market has become. Ben Carlson says the setup

The S&P 500’s top 10 stocks now account for 40% of total market value, underscoring how concentrated the US equity market has become. Ben Carlson says the setup leaves investors facing elevated single-name risk and a stronger case for rebalancing.