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Empowering Central Bank Asset Purchases: The Role of Financial Policies

Matthieu Darracq Paries (), Jenny Körner () and Niki Papadopoulou ()

No 2019-1, Working Papers from Central Bank of Cyprus

Abstract: This paper contributes to the debate on the macroeconomic effectiveness of expansionary non-standard monetary policy measures in a regulated banking environment. Based on an estimated DSGE model, we explore the interactions between central bank asset purchases and bank capital-based financial policies (regulatory, supervisory or macroprudential) through its influence on bank risk-shifting motives. We find that weakly-capitalised banks display excessive risk-taking which reinforces the credit easing channel of central bank asset purchases, at the cost of higher bank default probability and risks to financial stability. In such a case, adequate bank capital demand through higher minimum capital requirements curtails the excessive credit origination and restores a more efficient propagation of central bank asset purchases. As supervisors can formulate further capital demands, uncertainty about the supervisory oversight provokes precautionary motives for banks. They build-up extra capital buffer attenuating non-standard monetary policy. Finally, in a weakly-capitalised banking system, countercyclical macroprudential policy attenuates banks risk-taking and dampens the excessive persistence of the non-standard monetary policy impulse. On the contrary, in a well-capitalised banking system, the macroeconomic stabilisation with central bank asset purchases outweigh the marginal financial stability benefits with macroprudential policy.

Keywords: non-standard monetary policy; asset purchases; bank capital regulation; risk-taking; regulatory uncertainty; effective lower bound (search for similar items in EconPapers)
JEL-codes: E44 E52 E58 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-cba, nep-dge, nep-mac, nep-mon and nep-rmg
Date: 2019-02
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