GRIZZLY BULLS RESEARCH
S&P 500 top-10 concentration at seven decade endpoints
Data through June 30, 2025
38.15%
top-10 index weight
June 2025, versus 38.24% in June 1965.
Chart
Data
0%
10%
20%
30%
40%
1965
1975
1985
1995
2005
2015
2025