Monetary policy and risk taking. Bruegel Working Paper 2010/00, February 2010

We assess, through VAR evidence, the effects of monetary policy on banks’ risk exposure and find the presence of a risk-taking channel. A model combining fragile banks prone to risk mis-incentives and credit constrained firms, whose collateral fluctuations generate a balance sheet channel, is used to rationalize the evidence. A monetary expansion increases bank leverage. With two consequences: on the one side this exacerbates risk exposure; on the other, the risk spiral depresses output, therefore dampening the conventional amplification effect of the financial accelerator. Keywords: monetary policy, bank behavior, leverage, financial accelerator.

ECB Policy and Eurozone Fragility: Was De Grauwe Right? CEPS Working Document No. 397, June 2014

Paul De Grauwe’s fragility hypothesis states that member countries of a monetary union such as the eurozone are highly vulnerable to a self-fulfilling mechanism by which the efforts of investors to avoid losses from default can end up triggering the very default they fear. The authors test this hypothesis by applying an eclectic methodology to a time window around Mario Draghi’s “whatever it takes” (to keep the eurozone on firm footing) pledge on 26 July 2012. This pledge was soon followed by the announcement of the Outright Monetary Transactions (OMT) programme (the prospective and conditional purchase by the European Central Bank of sovereign bonds of eurozone countries having difficulty issuing debt). The principal components of eurozone credit default swap spreads validate this choice of time frame. An event study reveals significant pre announcement contagion emanating from Spain to Italy, Belgium, France and Austria. Furthermore, time-series regression confirms frequent clusters of large shocks affecting the credit default swap spreads of the four eurozone countries but solely during the pre-announcement period. The findings of this report support the fragility hypothesis for the eurozone and endorse the Outright Monetary Transactions programme.

Eurosystem collateral policy and framework: Was it unduly changed? Bruegel Policy Contribution 2014/14, 17 November 2014

All Eurosystem credit operations, including the important open market operations, need to be based on adequate collateral. Liquidity is provided to banks against collateral at market prices subject to a haircut. The Eurosystem adapted its collateral framework during the crisis to accept lower-rated assets as collateral. Higher haircuts are applied to insure against liquidity risk as well as the greater volatility of prices of lower-rated assets. The adaptation of the collateral framework was necessary to provide sufficient liquidity to banks in the euro area periphery in particular. In crisis countries, special emergency liquidity assistance was provided. More than 80 percent of the European Central Bank’s liquidity (Main Refinancing Operations and Long Term Refinancing Operations) is provided to banks in five countries (Greece, Ireland, Italy, Portugal and Spain). The changes in the collateral framework were necessary for the ECB to fulfil its treaty-based mandate of providing liquidity to solvent banks and safeguarding financial stability. The ECB did not take on board excessive risks.