Passive Funds Capture 55% of U.S. Assets, Concentrating 40% of S&P 500 in Top 10
Updated
Updated · Seeking Alpha · Jun 25
Passive Funds Capture 55% of U.S. Assets, Concentrating 40% of S&P 500 in Top 10
3 articles · Updated · Seeking Alpha · Jun 25
Summary
Passive investing now controls about 55% of U.S. fund assets, an analyst says, warning that market-cap buying is concentrating ever more money in the S&P 500’s biggest stocks.
The top 10 names already make up roughly 40% of the index, raising concerns that inflows keep lifting mega caps while fundamentally strong smaller companies are overlooked.
Tesla’s 2020 S&P 500 inclusion is cited as a case study: forced index buying helped drive the stock about 70% higher without a corresponding fundamental change.
The bear case is not complete, though, because factor ETFs still respond to fundamentals and 79% of active large-cap funds still lagged the S&P 500 in 2025.
The analyst says they continue buying VOO and QQQ but sees a possible 75% to 83% passive-ownership ceiling—and any future forced inclusion such as SpaceX—as risks worth watching.