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Jorge Abad
- 14 October 2026
- WORKING PAPER SERIES - No. 3299Details
- Abstract
- How does heterogeneity in banks’ interest-rate risk exposure shape monetary policy transmission? We develop a quantitative macroeconomic model of heterogeneous banks to answer this question. We establish an irrelevance result: differences in interest-rate risk exposure between fixed- and variable-rate banking systems matter for transmission only when bank solvency concerns become relevant. Calibrating the model to the euro area, we show that idiosyncratic default risk pushes a substantial share of banks toward the solvency threshold, making heterogeneity quantitatively important. When policy rates rise, fixed-rate banks suffer net interest margin compression—funding costs increase while legacy loan income stays unchanged—eroding capital and triggering sharper deleveraging. The lending elasticity to monetary policy is one-third larger in fixed-rate economies. The effects extend to financial stability: tightening raises bank failure rates in fixed-rate systems while lowering them in variable-rate systems. The results provide a rationale for macroprudential and monetary policy coordination and for monetary policy gradualism.
- JEL Code
- E51 : Macroeconomics and Monetary Economics→Monetary Policy, Central Banking, and the Supply of Money and Credit→Money Supply, Credit, Money Multipliers
E52 : Macroeconomics and Monetary Economics→Monetary Policy, Central Banking, and the Supply of Money and Credit→Monetary Policy
G21 : Financial Economics→Financial Institutions and Services→Banks, Depository Institutions, Micro Finance Institutions, Mortgages
G28 : Financial Economics→Financial Institutions and Services→Government Policy and Regulation - Network
- Challenges for Monetary Policy Transmission in a Changing World Network (ChaMP)
- 6 July 2026
- OCCASIONAL PAPER SERIES - No. 389Details
- Abstract
- This Occasional Paper reviews evidence from the ChaMP Research Network on the transmission of monetary policy to firms in the euro area. Overall, transmission to firms remains effective, including during the 2022-23 tightening cycle. However, new results show that this transmission is neither uniform nor mechanical. The pass-through from policy rates and other instruments to corporate financing conditions is shaped by multiple layers of heterogeneity that may, in some cases, have aggregate implications. Country-level segmentation, linked to sovereign risk, institutional frameworks and local lending practices, plays an important role in shaping transmission, especially during periods of stress. Beyond cross-country effects, bank balance sheets and business models also influence transmission by affecting the strength of lending responses. In particular, the composition of banks’ liabilities can lead to different speeds of transmission. Firm characteristics further differentiate the impact of monetary policy, with the funding mix playing a critical role. At the contract level, collateralisation and interest rate fixation materially affect both the magnitude and composition of transmission. As some of these heterogeneities may, in certain circumstances, have aggregate implications, this paper explains how a broad and flexible toolkit, centred on the main policy rate and, when needed, complemented by other policy instruments such as asset purchases and targeted liquidity operations, can be deployed in a proportionate manner to ensure effective monetary policy transmission across a structurally diverse monetary union.
- JEL Code
- E52 : Macroeconomics and Monetary Economics→Monetary Policy, Central Banking, and the Supply of Money and Credit→Monetary Policy
E58 : Macroeconomics and Monetary Economics→Monetary Policy, Central Banking, and the Supply of Money and Credit→Central Banks and Their Policies
G21 : Financial Economics→Financial Institutions and Services→Banks, Depository Institutions, Micro Finance Institutions, Mortgages
G32 : Financial Economics→Corporate Finance and Governance→Financing Policy, Financial Risk and Risk Management, Capital and Ownership Structure, Value of Firms, Goodwill