Equity Market Concentration - Market Capitalization of 10 Largest Companies as Share of S&P 500 Total

The S&P 500’s concentration in its top 10 stocks has reached 38%, surpassing the 27% seen during the 2000 tech bubble, raising concerns about market diversification and stability.

Image: Goldman Sachs Global Investment Research

Equity Market Concentration - Market Capitalization of 10 Largest Companies as Share of S&P 500 Total