Earlier quoted context omitted.
Maybe a stupid question, but if the velocity goes up, couldn't/wouldn't the Fed contract the supply? It seems like having large supply is desirable/correct when velocity is low.
No. We live in a fiat currency world where every dollar is allowed to leverage 10x. This means that every dollar defaulted on results in the destruction of 10 dollars. Even during the housing crash of 2008, the money supply didn't contract because the government was forced to keep the money supply constant, and if they did not it would lead to cascading failures that would destroy the currency entirely. Allowing the…
Also in 2008, it looks like money velocity decreased during the recession (as it's been doing almost monotonically since the mid 90s). It looks like after the crash, velocity increased slightly, and indeed the supply contracted just slightly at basically the exact same time.