Architectural evolution of central securities depositories : Standards-driven modernisation, modular design, and resilient infrastructure

This paper examines how central securities depositories (CSDs) are reassessing infrastructure architecture in response to accelerating change across settlement cycles, data demands, and digital asset innovation. It argues that modernisation is not a wholesale replacement of legacy systems but a strategic reconfiguration of core functions — settlement, custody, servicing, and governance — into modular, interoperable components capable of adapting to evolving market and regulatory pressures. Cloud hosting, containerisation, and data lake architectures are enabling greater scalability and resilience, while also introducing new considerations around jurisdictional compliance and operational control. Furthermore, the implications of artificial intelligence (AI) deployment and digital asset servicing emphasise the need for governance-by-design and standards-based interoperability. Through a synthesis of technical and institutional perspectives, the paper offers a practical appraisal of the growing architecture priorities for CSDs. This article is also included in The Business & Management Collection which can be accessed at https://hstalks.com/business/.