Equity Market Concentration – Market Capitalization of 10 Largest Companies as Share of S&P 500 Total
Equity Market Concentration – Market Capitalization of 10 Largest Companies as Share of S&P 500 Total Concentration has turned the S&P 500 into a top-heavy index. The biggest 10 stocks now account for 40% of its weight and 38% of earnings, pushing multiples higher and magnifying daily moves. Image: Goldman Sachs Global Investment Research