What is Stock Exchange Daily Official List & its Impact

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  • 20 Nov 2023
What is Stock Exchange Daily Official List & its Impact

Key Highlights

  • Securities traded on the London Stock Exchange and other smaller UK exchanges are identified by their seven-character alphanumeric code, known as SEDOL, or Stock Exchange Daily Official List.

  • Determining the asset class is critical for many stakeholders, such as hedge funds, mutual funds, and investment trusts.

  • An international database for referencing securities that guarantees precise identification is the SEDOL Masterfile (SMF).

  • SEDOL codes are assigned according to predetermined conventions; the alphanumeric part begins with letters B–Z and numbers 0–9, and there is a following check digit for verification.

Securities that trade on the UK stock exchanges are granted a seven-character alphanumeric identifying code called SEDOL. SEDOL is used by a number of stakeholders to determine the asset class, including investment trusts, mutual funds, common stock, hedge funds, and insurance.

One reason a unique SEDOL is important is when a listed firm issues shares that belong to several classes. As an illustration, equity shares of Tata Motors have both ordinary and differential voting rights (DVR). Voting rights are reduced for DVR shares. The trader must indicate the type of shares at the time of acquisition or sale.

Bond trading is far more intricate. Businesses may issue bonds that mature in a variety of years, such as 2025, 2030, and 2045. Certain bonds could mature in April and others in September of 2030. Bonds maturing in April could have varying coupon rates. Every kind of connection is unique and has distinct rights and responsibilities. The bond terms may be the same in foreign markets, but the trading currency may be different. Bonds having the same coupon and maturity in USD and EUR may have been issued by the same issuer.

For every asset class, it is imperative to preserve the master data of SEDOL codes. SEDOL Masterfile (SMF) is a worldwide data repository that offers references to many different securities. Every security has a unique SEDOL code attached to it. Furthermore, SEDOL codes might vary depending on the circumstances. When companies combine, get acquired, have their shares reclassified, move their headquarters, or change their name, SEDOL codes may need to be altered.

There are other significant global marketplaces with their own identifying systems. For example, the International Securities Identification Number (ISIN), which is utilized in India, is one example. The Committee on Uniform Securities Identification Procedure, or CUSIP, is utilized in the United States and Canada.

Although the unique identification may change, conversion protocols are established. By applying certain rules, an ISIN may be created from a SEDOL. It is also possible to convert CUSIP into SEDOL and vice versa.

SEDOL's main goals are asset identification and to act as a worldwide security instrument. SEDOL has shown to be a useful tool throughout time.

Enhanced Efficiency: SEDOL plays a vital role in improving overall trading efficiency and reducing the costs associated with cross-border trade failures. It streamlines the trading process, making it more efficient.

Reduced Turnaround Times (TATs): SEDOL codes are known for their promptness, and the time required for issuance is minimal. Country-level assignment of codes further accelerates the turnaround time, making it quicker and more efficient.

Comprehensive Coverage: SEDOL codes are designed to encompass all types of securities and asset classes, whether they are listed or unlisted. These codes are assigned to securities traded in major financial markets worldwide, reducing the necessity for multiple identifiers.

Global Acceptance: SEDOL codes are widely accepted on a global scale, simplifying the conversion process of SEDOL into other identifiers. Similarly, guidelines are established for converting other identifiers into SEDOL, ensuring a smooth and standardized approach to asset identification.

SEDOL codes follow predefined guidelines and are organized in a certain way. SEDOL codes consist of characters that come after numerals at the start. The alphanumeric code is represented by the first six digits, and the final digit is known as the trailing check digit.

SEDOL codes were only numerical until 2004. They have since been distributed in a consecutive order, starting with B000009. The SEDOL code's alphanumeric portion may only contain the letters B–Z and the digits 0–9. Numbers come before letters, and vowels are never utilized. SEDOL codes now start with a letter.

The code's tail digit is chosen so that the weighted average of the seven integers is greater than or equal to ten. For this procedure, a number is assigned to each letter. Every letter in the alphabet has a corresponding location, plus nine. D thus corresponds to 4+9 = 13. The trailing digit is used to confirm that the code is correct. It is thus recommended that traders thoroughly examine and confirm the validity of the SEDOL codes.


Overall, global interdependence and extraordinary dynamicity characterize securities trading. Trading asset tracking calls for a recognizable and secure approach. SEDOL codes guarantee that the right stocks are purchased, simplify the transaction process, and lessen investor uncertainty.


SEDOL stands for Stock Exchange Daily Official List, representing a unique identification system for securities trading.

A SEDOL code comprises seven characters, with the first six being alphanumeric characters and the last one being a check digit used for validation.

A SEDOL code is crucial for stakeholders in finance, including investment trusts, mutual funds, and hedge funds, to identify and classify different types of securities.

SEDOL codes streamline trading processes, reducing cross-border trade failures and associated costs, ultimately making trading more efficient.

While SEDOL is primarily used in the UK, it is recognized internationally and serves as a standard for identifying traded securities.

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