A central securities depository (CSD) is a financial market infrastructure that holds securities in dematerialised or immobilised form and enables their transfer through book-entry, providing safekeeping and settlement of trades. It maintains the authoritative record of securities ownership and supports the final leg of post-trade processing, often in conjunction with clearing houses. By centralising custody and settlement, a CSD reduces operational risk and is foundational to the integrity of securities markets.
Overview
- A CSD dematerialises securities, replacing physical certificates with electronic book-entry records of ownership.
- It settles the securities leg of transactions, typically against payment via delivery-versus-payment mechanisms.
- CSDs interoperate with clearing houses and payment systems to complete the post-trade lifecycle.
- Distributed-ledger experiments seek to replicate or replace CSD functions with tokenised securities and on-chain settlement.
Key aspects
- Book-entry settlement — transfer of ownership by electronic ledger entries rather than physical delivery.
- Safekeeping and custody — authoritative maintenance of securities accounts and holdings.
- Notary function — recording and validating the issuance and transfer of securities.
- Delivery-versus-payment — simultaneous, conditional exchange of securities and cash to eliminate principal risk.
- Interoperability — links with clearing houses, payment systems, and other CSDs across borders.
Applications
- National securities markets safekeeping equities and bonds.
- International CSDs handling Eurobonds and cross-border settlement.
- Tokenised securities pilots integrating CSD functions with distributed ledgers.
- Collateral management and corporate-action processing for institutional holders.