Investment funds and the monetary-macroprudential policy interplay

Is there an undesired side-effect of banking regulation on the non-bank sector? How effective is the non-bank transmission channel of monetary policy in the presence of macroprudential policy? Using a state-dependent local projection approach and a rich dataset capturing macroprudential tightening across euro area countries, we present strong cross-country heterogeneity. In financially conservative markets (Germany, France, the Netherlands), tight monetary policy combined with stricter macroprudential measures significantly contracts investment fund assets. Conversely, financial hubs (Luxembourg, Ireland, Italy) experience counterintuitive expansions under the same policy mix. We introduce a simple balance-sheet framework that shows how interacting funding-cost and collateral-constraint channels generate these opposing responses. Further disaggregation shows that equity funds are more vulnerable to joint tightening in conservative systems, while bond funds partly offset contractionary forces in hubs through higher yields. JEL Classification: E58, G21, G28, G51