The big three are increasingly dominant, even more so in small cap stocks.
“Last year, the big once again became even bigger. At the end of 2021, Vanguard, BlackRock and State Street, the three biggest index fund providers, together control on average 18.7 per cent of S&P 500 companies, according to Lazard. Their ownership of smaller companies is even more concentrated. By the end of last year, they held 22.8 per cent of shares in the midsized S&P 400 index, and 28.2 per cent of the small-company S&P 600 benchmark.“
