CSD (Central securities depository)
A central securities depository (CSD) is an entity that operates a securities settlement system and provides the initial recording of securities in book-entry form (notary service) or central maintenance of securities accounts at the top tier. In the EU CSDs are authorised under the Central Securities Depositories Regulation (CSDR).
Roles that need it
What it is
A central securities depository (CSD) is the institution at the top of the holding chain for securities issued in a market. The Central Securities Depositories Regulation (CSDR) defines a CSD by its core services: the notary service, which is the initial recording of securities in book-entry form; the central maintenance service, which is providing and maintaining securities accounts at the top tier; and the settlement service, which is operating a securities settlement system.
Issuers record their shares or bonds at a CSD. Banks, brokers and custodians open accounts there as participants and hold securities for themselves and their clients. CSDs may also offer ancillary services such as corporate actions processing, collateral management and securities lending. International central securities depositories (ICSDs) do the same for Eurobonds and across borders.
Why it matters
The CSD keeps the integrity of the issue: the total number of securities in participants’ accounts must equal the amount issued. CSDR requires daily reconciliation to protect this. If the CSD fails, investors may not be able to prove what they own or settle trades, so the Principles for financial market infrastructures treat CSDs as systemically important.
CSDs also run the settlement discipline regime in the EU. They operate matching, offer partial settlement, calculate cash penalties for fails and report fails to authorities. Most euro area CSDs use the Eurosystem’s T2S platform for settlement in central bank money.
Worked example
Illustrative numbers. A company issues 50,000,000 shares through a CSD. At the end of a day the CSD’s books show three participants: Bank A with 20,000,000 shares, Custodian B with 25,000,000 and Broker C with 5,000,000. The total is 50,000,000, so the issue reconciles.
If a capital increase adds 5,000,000 new shares, the CSD records them on the issuer’s instruction and credits the participants that subscribed. After that the total must equal 55,000,000. Any difference, for example a 1,000 share gap caused by a booking error, is an issue integrity break, and CSDR requires the CSD to suspend settlement in that security until it is fixed.
Who uses it
Settlements Analysts send instructions to the CSD and monitor its settlement cycles. Custody Operations Analysts hold client securities in CSD accounts. Corporate Actions Analysts receive event announcements and payments through the CSD. Company Secretaries for listed companies deal with the CSD as issuer agent for registers and shareholder identification. Treasury Operations Analysts manage cash for settlement. Regulatory Change Analysts follow CSDR changes.
Common confusions
A CSD is different from a central counterparty: the CSD settles and records, while the central counterparty becomes buyer to every seller and manages default risk. A CSD is also different from a custodian, which holds securities for clients through accounts at the CSD or through other custodians. Finally, T2S is a platform used by CSDs; the CSDs themselves keep the legal relationship with their participants.