NBER working papers are circulated for discussion and comment purposes. They have not been peer-reviewed or been subject to the review by the NBER Board of Directors that accompanies official NBER publications.

We study the effectiveness of central bank liquidity injections in restoring bank credit supply following a wholesale funding dry-up. We combine borrower-level data from the Italian credit registry with bank security-level holdings and analyze the transmission of the European Central Bank three-year Long Term Refinancing Operation. Exploiting a regulatory change that expands eligible collateral, we show that banks more affected by the dry-up use this facility to restore their credit supply, while less affected banks use it to increase their holdings of high-yield government bonds. Unable to switch from affected banks during the dry-up, firms benefit from the intervention.JEL: E50, E58, G21, H63

I develop a model where the sovereign debt capacity depends on the capitalization of domestic banks. Low-capital banks optimally tilt their government bond portfolio toward domestic securities, linking their destiny to that of the sovereign. If the sovereign risk is sufficiently high, low-capital banks reduce private lending to further increase their holdings of domestic government bonds, lowering sovereign yields and supporting the home sovereign debt capacity. The model rationalizes, in the context of the eurozone periphery, the increase in domestic government bond holdings, the reduction of bank credit supply, and the prolonged fragility of the financial sector.JEL Codes: E44, F33, G21, G28

We analyze how regulatory constraints on household leverage—in the form of loan-to-income and loan-to-value limits—a?ect residential mortgage credit and house prices as well as other asset classes not directly targeted by the limits. Supervisory loan level data suggest that mortgage credit is reallocated from low-to high-income borrowers and from urban to rural counties. This reallocation weakens the feedback loop between credit and house prices and slows down house price growth in “hot” housing markets. Consistent with constrained lenders adjusting their portfolio choice, more-a?ected banks drive this reallocation and substitute their risk-taking into holdings of securities and corporate credit.