How much of the S&P 500's gain came from seven stocks?
Core argument: The S&P 500's total market value rose by $8 trillion, or 24.2%, during 2023, with the Magnificent Seven — Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia, and Tesla — accounting for 52% of that increase.
The total market value of all 500 stocks in the S&P 500 has increased by $8 trillion or 24.2% during 2023. Without the seven Mag7 stocks [Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia, and Tesla,] the value of the index would have risen by “only” USD 3 trillion, which corresponds to a return of 11.7%. In other words, the Mag7s are responsible for 52% of the increase in the total market value of all 500 stocks in the S&P 500. At the end of August, Mag7 had accounted for more than 70% of the value created by all the companies in the S&P 500. Today, that share has fallen to 52%. So it’s still a concentrated rally, but not as concentrated as it was right after the summer.

