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The difference in the two examples has to do with if there are an odd or even number of digits after converting letters to number. Since the NSIN element can be any alpha numeric sequence (9 characters), an odd number of letters will result in an even number of digits and an even number of letters will result in an odd number of digits.
SEDOL stands for Stock Exchange Daily Official List, a list of security identifiers used in the United Kingdom and Ireland for clearing purposes. The numbers are assigned by the London Stock Exchange , on request by the security issuer.
SEDOL - Reference to SEDOL removed (the official UK security identifier that forms part of GB ISINs). Link - Link to anna-web (official Association of NNAs) being replaced with a link to isin.net (a commercial site that makes money from acting as a middleman between a buyer and an NNA).
The ISIN code is a 12-character alpha-numerical code that does not contain information characterizing financial instruments, but serves for uniform identification of a security at trading and settlement. The ISIN identifies the security, not the exchange (if any) on which it trades; it is, therefore, not a replacement for the ticker symbol. [7]
At its most basic level, reference data for a simple sale of a stock in exchange for cash on a highly liquid stock exchange that involves a standard label for the underlying security (e.g., its ISIN), the identity of the seller, the buyer, the broker-dealer(s), the price, etc. At its most complex, reference data covers all relevant particulars ...
The Market Identifier Code (MIC) (ISO 10383) is a unique identification code used to identify securities trading exchanges, regulated and non-regulated trading markets.The MIC is a four alphanumeric character code, and is defined in ISO 10383 [1] by the International Organization for Standardization (ISO). [2]
The origins of the CUSIP system go back to 1964, when the financial markets were dealing with what was known as the securities settlement paper crunch on Wall Street. [5] [6] [7] At that time, increased trading volumes of equity securities, which were settled by the exchange of paper stock certificates, caused a backlog in clearing and settlement activities.
In the United Kingdom, the NNA is the London Stock Exchange and the NSIN is the SEDOL. In France, the NNA is Euroclear France and the NSIN used to be the Sicovam code. As of July 1, 2003 SICOVAMs are no longer issued, ISINs being used instead. In Germany, the NNA is Wertpapier-Mitteilungen and the NSIN is the WKN.