They're not just the biggest whales, but possibly
the only whales that matter.I mean, $9T is a lot. For comparison, the world's largest and most popular index fund, Vanguard's 500 Index Fund, with a gigantic number of investors, holds "only" $0.4T in investments.
Put another way, $9T works out to ~$1100 of liquidity injected into the financial system for every man, woman and child alive!
It's hard to reason about the impact of such incomprehensibly large injections of liquidity on the behavior of financial markets.