Vanguard is an index fund, their buying and selling is market capitalization weighted. Reading "into" their buying and selling habits is futile, their behavior is almost entirely algorithmic. It was absolutely predictable that if Elon drove up twitter's market cap, within a couple days Vanguard would have to buy accordingly to rebalance.
Because Elon's buying drove up the price.
Vanguard is an index fund, their buying and selling is market capitalization weighted. Reading "into" their buying and selling habits is futile, their behavior is almost entirely algorithmic. It was absolutely predictable that if Elon drove up twitter's market cap, within a couple days Vanguard would have to buy accordingly to rebalance.