AI Big 10 Reach Record ShareThe “AI Big 10” now accounts for a record 42% of US stock market cap, including the Magnificent 7, Broadcom $AVGO, AMD $AMD, and Micron $MU.
This figure has more than doubled since the 2022 bear market low. The 2000 Dot-Com Bubble saw the Technology, Media & Telecom sector peak at 41%, while the Nifty Fifty peaked at 40% in the 1970s.
Japan’s equity bubble peaked at 44% in the 1980s. Only railroad stocks have significantly exceeded this concentration, reaching 63% of US market cap at their peak in the 1900s.
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