The European Banking Union, with its own EU supervisory institutions such as the ECB, has had us forget that banking law mainly consists of transactions with and between clients. It is to a large extent (European) contract law. This volume investigates how the post-crisis supervisory regime of the EU and the Eurozone impacts on bank managers' duties and on market transactions: in their relationship to the large range of stakeholders, including the public as such, in current lending and investment transactions, in the phase of recovery and resolution (with bail-ins triggering changes of contractual rights), but also in adjudication, namely in banking related ADR schemes. It concludes with a look at the ongoing endeavour to extend the banking union to a capital market and more generally a financial union.