The answer: "40 gallons". At a time when central bankers seem impervious to the imminent recession and job losses that loom ahead as they make their rational and cool-headed jumbo rate hikes, a famous central banker's favourite joke comes to mind. A man needs a heart transplant. The doctor offers the heart of a five-year old boy. "Too young!" says the man.
"How  7/9  BIS - Central bankers' speeches  about the heart of a 40-year old treasury head?" "He doesn't have a heart". Then how about the heart of a 75-year old central banker?" "I will take it!" "But why?" "It's never been used!"