We investigate how European banks' overnight borrowing costs depend on bank size. We use the Eurosystem's proprietary interbank daily loan data on euro-denominated transactions from 2008-2014. We find that large banks have had a clear borrowing cost advantage over small banks and that this...

We construct a measure of a bank's relative creditworthiness from Eurosystem's proprietary overnight loan data: the bank's “average overnight borrowing rate spread, relative to overnight rate index” (AOR). We investigate the dynamic relationship between the AOR and the credit default swap...