Imthurn, AndreasAndreasImthurn2023-04-132023-04-132021-09-20https://www.alexandria.unisg.ch/handle/20.500.14171/109920The financial market regulation PSD2 (Directive 2015/2366) in conjunction with the RTS (Regulation (EU) 2018/389) marks the start of open banking in Europe. The regulation breaks the payment accounts monopoly of the banks, as third-party service providers must be granted access to their data with the consent of the customers. In the vast majority of cases, this access is provided via a dedicated API, which is a precursor to the open banking APIs. In addition, the new payment service providers (AISP and PISP), strong customer au-thentication, information obligations and liability are regulated throughout Europe in the inter-ests of full harmonization. Implementation of the directive in the member states has been slow, so that PSD2 including RTS will not be fully in force until the end of 2020. The effects of regulation are multi-layered, as various value chains are being redesigned and the focus is increasingly on financial ecosystems. There is also a structural change in the payment in-dustry towards a cashless world and emerging payment rails. Switzerland does not have to implement PSD2, but due to its SEPA membership there is an equivalence requirement in various areas. The Swiss financial center is against an analogous Swiss PSD2 regulation, since open banking must be market oriented. However, an analogous Swiss regulation like PSD2 would be recommended for reasons of legal certainty.deEuropäische UnionSchweizKapitalmarktrechtEuropäische Union: Richtlinie über Zahlungsdienste im Binnenmarkt (2015)EDIS-5114APIAISPZahlungsdiensterichtliniePSD2PISPOpen BankingFinanzmarktrechtdoctoral thesis