Using a bank-firm level credit registry combined with firm-level balance sheet data we establish the presence of heterogeneity in the effects of unconventional monetary policy transmission. We examine the consequences of a loosening in the collateral eligibility requirement for credit refinancing in France. The policy was designed to affect bank lending positively. We expect a linear increase in lending and an additional increase in loans to firms with newly acceptable rating. We find a large heterogeneity of the monetary policy transmission including the unexpected reduction of lending by the banks benefiting the most from the policy. These are small, risk-averse banks whose foremost concern after the recession was to strengthen their balance sheets. Banks least affected by the policy respond with a reduction in credit to low risk borrowers in reaction to the change in the market structure. Last we document heterogenous effects of the policy on firms depending on their size.
