How much of US equity market gains came from seven tech giants?
Core argument: The Magnificent Seven — Apple, Microsoft, Alphabet, Amazon, Nvidia, Meta and Tesla — added $5.1 trillion in combined market capitalization in 2023, accounting for more than 50% of the increase in the entire US equity market's value.
Let's look at the performance of the Mag 7 [AAPL, MSFT, GOOGL, AMZN, NVDA, META, TSLA] in 2023 when their collective market capitalization increased by a staggering $5.1T. Nvidia and Meta were the best performers, with the former more than and the latter almost tripling in value over the period. In terms of dollar value added, Microsoft and Apple each added a trillion dollars to their market capitalizations. These seven companies accounted for more than 50% of the increase in market capitalization of the entire US equity market. With them, US equities had price appreciation of 23.25% for the year, but without them, the year would have been an average one, with returns on 12.6%. Over the eleven-year period, the cumulative market capitalization of the seven companies has risen from $1.1 trillion in 2012 to $12 trillion in 2023. To put these numbers in perspective, the Mag Seven companies now have a market capitalization larger than that of all listed stocks in China.

