Michael Kumhof and Mauricio Salgado-Moreno

While ‘unconventional’ balance-sheet policies like quantitative easing (QE) and quantitative tightening (QT) appear to have been successful, it is difficult to separate their macroeconomic and financial stability implications from those of other polices. Hence, in a recent paper, we develop a theoretical framework, focusing on the central bank’s liabilities, that sheds light on these implications. The key model feature is the inclusion of a detailed financial system with both heterogeneous banks and non-bank financial institutions that allows us to identify the transmission of QE/QT policies. Our framework provides guidance to policymakers interested in using new combinations of balance sheet and interest rate policies by highlighting the relevance of the interbank market and financial frictions in the transmission of balance sheet policies.