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Stock Exchange Daily Official List (SEDOL)


The Stock Exchange Daily Official List (SEDOL) is a unique seven-character identifier used in the United Kingdom and Ireland for securities, such as stocks and bonds. It is issued by the London Stock Exchange to ensure a unique identification of securities across global markets. Its primary use is to clear and settle trades in the exchange market.


The phonetic pronunciation for Stock Exchange Daily Official List (SEDOL) can be broken down like this: Stock: /stɒk/Exchange: /ɪksˈtʃeɪndʒ/Daily: /ˈdeɪli/Official: /əˈfɪʃəl/List: /lɪst/SEDOL: /ˈsiːdɒl/This is in the International Phonetic Alphabet (IPA) which is widely used for the phonetic transcription of speech.

Key Takeaways

<ol><li>SEDOL, or Stock Exchange Daily Official List, is a unique seven-character identification code assigned to securities that are traded in the United Kingdom.</li><li>It is used for clearing systems and is recognized globally to facilitate cross-border trading. The system is maintained and regulated by the London Stock Exchange.</li><li>Each SEDOL code is unique, making it an important tool for ensuring accuracy and efficiency in the trade and settlement of securities.</li></ol>


The Stock Exchange Daily Official List (SEDOL) is important because it provides a unique identifier for all securities issued internationally. As a global standard, it facilitates unambiguous identification and efficient tracking of securities, which aids in avoiding any mistake relating to the buying or selling of securities. This list also allows for smooth communication between different stakeholders in the financial world, such as brokers, traders, and regulators. Therefore, SEDOL plays a vital role in maintaining the accuracy, efficiency, and reliability of global financial trading and related transactions.


The Stock Exchange Daily Official List (SEDOL) serves a crucial role in the financial world as a unique identifier for securities traded on the London Stock Exchange. Given how global financial markets function today, with thousands of trades occurring every second, having an accurate and instant way to identify individual securities significantly enhances efficiency and reduces the potential for errors. The SEDOL is specifically designed for this purpose, ensuring the seamless management and tracking of securities across markets and exchanges.The purpose of SEDOL goes beyond just the identification of securities. It is crucial for different aspects of securities processing, including trading, settlement, and reporting. This seven-character alphanumeric code allows for detailed and precise reporting of trading data, enabling investors, brokers, and regulators to track and evaluate the performance of individual securities. Also, during transactions, traders use SEDOL codes to eliminate any ambiguities and execute trades accurately. These codes are used broadly by the financial industry to facilitate the international clearing and settlement of trades.


1. London Stock Exchange (LSE): The LSE uses this SEDOL coding system extensively for the identification of their listed securities. For example, the LSE assigns a SEDOL number to all of the shares listed on its exchange, so HSBC Holdings, one of the largest banking and financial services organizations in the world with shares listed on the LSE, has a unique SEDOL code that facilitates seamless trading and tracking.2. Fund Management Companies: Large fund management companies, like BlackRock or Vanguard, use SEDOL codes to accurately track, trade and manage their various portfolios. Without these unique identifiers, it would be very difficult for fund managers to accurately track the performance of tens of thousands of securities they handle worldwide across different markets.3. Data Vendors and Financial Info Systems: Bloomberg, a prominent data vendor, uses SEDOL numbers in its trading platform and in its analytics. IBM’s financial information system for example, also uses SEDOL numbers to accurately provide real-time market data and analytics to its customers.

Frequently Asked Questions(FAQ)

What is a Stock Exchange Daily Official List (SEDOL)?

A SEDOL is a unique seven-character identification code that is assigned to all securities trading on the London Stock Exchange and other exchanges in the U.K. and Ireland.

Who assigns SEDOL codes?

The London Stock Exchange assigns these codes.

What is the format of a SEDOL code?

A SEDOL code consists of seven alphanumeric characters, with each character carrying a unique value.

Why are SEDOLs utilized?

They are used to facilitate clear transaction communication across different regions and databases. SEDOLs ensure that trades are executed accurately and efficiently.

How is SEDOL different from other security identification numbers?

A key difference is geographic. While ISINs and CUSIPs are used internationally and in North America respectively, SEDOLs are primarily used in the U.K and Ireland.

Can a single security have multiple SEDOL codes?

Yes, a single security can have different SEDOL codes. For instance, a security listed on multiple exchanges may have a different SEDOL for each listing.

Can a SEDOL code be changed or reissued?

In general, once a SEDOL code is issued, it will not be changed or reissued for the same security.

Is there a comprehensive list of all SEDOL codes in existence?

There isn’t a public list of all SEDOL codes. SEDOL Masterfile, a proprietary database maintained by the London Stock Exchange, contains the information.

Is a SEDOL necessary for trading a security?

Although they are not required universally, SEDOLs play a crucial role in ensuring accurate trade communication and execution in U.K and Ireland markets. Hence, it is a good practice to utilize them.

Related Finance Terms

  • Securities Identification Number: This is an unique code that identifies specific securities, like the SEDOL, which is used specifically in the UK and Ireland.
  • International Securities Identification Number (ISIN): This international code identifies specific securities. It is formed from a SEDOL or other national securities identifier.
  • CUSIP Number: This is a similar identifier used primarily in the United States and Canada to uniquely identify financial securities.
  • London Stock Exchange (LSE): The exchange where SEDOL codes are primarily used. It is one of the world’s oldest stock exchanges.
  • Financial Information eXchange (FIX): This refers to the electronic communication protocol for international real-time exchange of securities transaction information. It is often used in correlation with identifiers like SEDOL to manage and execute trades.

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