Dudley, William C. on 2017 September 7 at 19:00
[Our early estimates would suggest] a normalized balance sheet size of, perhaps, $2.4 trillion to $3.5 trillion in the early 2020s.
This leads us to the next question: Assuming that a floor system is retained, what amount of reserves will be needed in the banking system so that day-to-day open market operations are not necessary to keep the federal funds rate within its target range? … As a rough starting point, we have suggested that the necessary amount of excess reserves could be in a range of $400 billion to $1 trillion. Coupled with uncertainty about the likely growth in other factors, such as currency outstanding, this implies a normalized balance sheet size of, perhaps, $2.4 trillion to $3.5 trillion in the early 2020s. Dudley, William C.
Money Marketeers of NYU