Monetary tightening disproportionately harms constrained households
A Banco de España working paper examines the financial stability risks and distributional effects of monetary policy tightening. The study shows that macroprudential policies can mitigate uneven adjustment costs for constrained households.
The uneven burden of higher rates
Researchers at the Banco de España and the European Central Bank examine how monetary tightening affects financial stability using a macro-banking model with leveraged borrowers and endogenous default.
Higher policy rates increase debt-servicing costs, generating bank losses and amplifying credit contraction.
The study finds that financially constrained households bear a disproportionate share of the adjustment, facing sharp cuts in consumption and housing demand.
In contrast, unconstrained saver households are largely insulated, experiencing much smaller welfare losses driven mainly by intertemporal substitution.
Structural shields and cyclical risks
The paper evaluates alternative macroprudential policies, distinguishing between structural and countercyclical instruments.
Structural measures like higher capital requirements and tighter loan-to-value caps increase ex ante resilience and reduce default risks.
Countercyclical capital buffer releases support lending only when banks enter tightening cycles with strong balance sheets; when capitalization is weak, they can increase bank fragility and amplify credit contraction.
Well-designed buffers are essential
The research delivers crucial insights into the interaction between monetary and macroprudential policies.
It demonstrates that one-size-fits-all cyclical interventions fail when bank balance sheets are fragile.
Ultimately, policymakers must carefully coordinate rate decisions with pre-existing borrower-based safeguards.