Multiple sources directly corroborate the statement. A CNBC article from January 2019 explicitly states, 'He also mentioned flexibility in terms of the balance sheet.' A PBS article from the same period reports that Powell said the Fed 'could alter its approach to trimming its huge balance sheet if it determines such a change is needed.' The concept is further supported by a source discussing the Fed's strategic review, which resulted in 'more discretion' (a synonym for flexibility) regarding its policy tools, including the balance sheet.