In the world of securities, market infrastructures are the systems that ensure the good course of the following operations :

The market place is the place in which a market operates, and offer and demand meet.
It can be an actual or metaphorical place whose role is to provide participants with a secured transaction mechanism
The following table highlights the main quotation places, as well as their managing institutions.
| Geographical area | Quotation place | Codification | Institutional operator | Capitalisation 2005(millions $) |
| US | The New York Stock Exchange | NYSE | Nyse-Euronext | 13 310 592 |
| US | The National Association of Securities Dealers Automated Quotations | NASDAQ | NASDAQ OMX Group | 3 603 985 |
| GB | The London Stock Exchange | LSE | The London Stock Exchange Group plc. | 3 058 182 |
| FR, BE, NL, PT | Euronext | Nyse-Euronext | 2 766 804 |
|
| DE | Deutsche Börse | Deutsche Börse Group. | 1 221 106 |
|
| SWE, FIN | Optionsmäklarna/Helsinki Stock Exchange | OMX group | NASDAQ OMX Group | 802 561 |
| ES | Bolsa de Madrid | Bolsa y Mercado espanoles | 959 910 |
|
| CH | The Swiss Exchange | SWX | Association SWX Swiss Exchange | 935 448 |
| IT | Borsa Italiana | The London Stock Exchange Group plc. | 798 073 |
|
| IN | The Bombay Stock Exchange (Mumbai Seyar Bajar) | BSE | The Bombay Stock Exchange Limited | |
| SG | The Singapore exchange | SGX | Singapore Exchange Limited | |
| HK | The Hong Kong Stock Exchange | HKEX | Hong Kong Stock Exchange and Clearing | |
| CN | The Shanghai Stock Exchange | SSE | China Securities Regulatory Commision (CSRC) | |
| LU | Luxemburg Stock Exchange | Bourse de Luxembourg S.A |
The Clearing process guarantees the consistent course of operations. Clearing houses set up a central counterpart system which legally substitutes the clearing house to the buyer and the seller in order to ensure the completeness of transactions.
It is called “NOVATION”. Margin calls and deposits are the tools used so that to prevent default risk.
Technically, it is impossible for a clearing house to go bankrupt.
Where 100 buy-sell between two stakeholders would have created 100 transactions, a single but netted transaction is sent to the CSD.
More than just ensuring the course of operations, the clearing house provide a final balance on a net basis between two (Bilateral clearing) or more (multiple clearing) participants.
| Geographical area | Codification | Clearing house | Institutional operator |
| FR, BE, NL, PT, UK | LCH Clearnet | (London Clearing House) Clearnet | Euroclear (14,6%), utilisateurs (67,6%), les bourses (17,8%) |
| DE and the rest of the world for the clearing of international bonds. | Clearstream | - | Deutsche Börse Group |
| US | DTCC | Depository Trust & Clearing Corporation | DTCC (users association) |
The settlement process secures the physical exchange of the securities versus cash, through the settlement of a securities transaction following an OTC (over the counter) trade.
The settlement process may lead to cash settlement if the transaction was done ‘versus payment' (for this leg, a payment system intervenes). To decrease risks both legs have to be simultaneous and connate.
Securities settlement systems may operate on a net basis, transactions are settled one by one and are considered irrevocable.
On a net basis, several transactions are cleared before being globally settled.
From a legal point of view, it is at this level that the transfer of property is finalized. The Central Securities Depository, in line with local custodians, acts as a notary; registering every single existing security and their related corporate actions. Doing so, they can make sure at any time that the number of issued shares booked on the issuer account corresponds to the total amount of shares owned by its participants.
NB : Do not confuse Depository and Central Securities Depository.
The Central Securities Depository registers the totality of the securities (shares & bonds) that are part of each issue accepted for its operations. In France , the CSD is know as Euroclear France (former Sicovam).
The depository or custodian, is generally a bank and is a CSD adherent.
| Central Securities Depository (CSD) | Code | Area | Institutional operator |
| Euroclear France | FR | Euroclear Plc | |
| Euroclear Nederland | NL | Euroclear Plc | |
| Euroclear Bank | BE | Euroclear Plc | |
| Crest CO | UK | Euroclear Plc | |
| Clearstream | DE | Deutsche Börse Group | |
| Depository Trust & Clearing Corporation | DTCC | US | DTCC (users' association) |
A cash settlement centre is a technical platform that handles the settlement of high amounts between international finance companies.
It is generally made up of a real time irrevocable & gross cash settlement system and a secured net one for multilateral clearing purposes.
In order to facilitate, secure and enhance interbank exchanges within the euro Zone, the TARGET project was launched (1999).
It consists in a Trans European Automated Real Time Gross Settlement Express Transfer, shared by each member of the European union, allowing cross border amounts to be transferred.
| Settlement system | Full name | Area | Institutional operator |
| CHAPS Clearing Co. | UK | CHAPS Clearing Co Ltd | |
| TARGET 2 | Euro | ECB and National Central Banks of the Euro-zone | |
| Fedwire | US | Federal Central Bank | |
| SIC | Swiss Interbank Clearing | CH | Telekurs on behalf of Swiss National Bank |
Starting from the end of the 90's, the stock market's infrastructure consolidation accelerated without, taking into account the European frontiers and bringing stakeholders together through crossed participations.
Until this point, market places and post market infrastructures (clearing & settlement systems) were state owned and user managed agencies.
At the same period, a privatization wave led to a disengagement of public institution. Gradually, regulation committees replaced the states in market supervision (AMF for France) and led to wild battles between private law companies, for the European race to catch market shares.
In 1999, the very first consolidation of clearing agencies took place; the pan-European extension of Clearnet (the central counterpart of the Euronext group) was preceded by the merge of two old clearing houses that used to intervene in the French stock market (SBF, Matif, BCC).To achieve cost cutting, several countries, where various settlement systems existed, decided to close in.
That is what happened for Spain (CADE & SDL), Italy (CAT & Monte Titoli) as well as the UK (merge of CMO, CGO & Crest).
At the level of settlement, the consolidation was organized around the two international central securities depository (ICSD) : Euroclear & CEDEL. In the late 2000's, the Belgian Euroclear Bank merged with the French CSD; Sicovam SA, to become a 100% Euroclear bank's subsidiary named Euroclear France.
Meanwhile, the merger of the CEDEL bank (based in Luxemburg) and DBC, the german depository, gave birth to Clearstream.
In September 2000, the Belgian and the Dutch stock market joined Euronext and brought a pan-European offer that encompassed multinational agencies that managed market's infrastructure.
In 2001, the Deutsche Boerse, Euronext and the LSE headed to IPO (Initial Public Offering).
A couple of months later, and against all odds, the Portuguese stock exchange and the Londonian derivative market joined Euronext.
The DB, which owns the world leading derivative market (EUREX) is achieving its vertical stategy; called the ‘Silo' strategy (total control of the transaction chain); Trading, Clearing and Settlement, by buying Clearstream in 2002.
After several failed attempts in merging with Euronext and the Deutsche Boerse, the LSE announced its successful take over on the Borsa Italia (the Italian exchange) in 2007.
This consolidation trend is also reaching the united states through the NYSE-Euronext merger.
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