Subject:
SEDOL uniqueness

Posted by:
Gary Carroll of Investment Technology Group on 27 July, 2001 at 19:09:33:

Message:
I've read some of the other post and they
answered most of my questions but...

We're building a securities master database
and I am trying to determine SEDOL uniqueness.

1) I understand that you try to limit a SEDOL to
only one per country, yet several years ago I
remember coming across several securities that had a
listing for a security on Munich and another SEDOL
listed in Frankfurt. Can this happen? Also in
another message you stated uniqueness,except for London
were you implying that London/UK does/could have
multiple SEDOLs for one security? I remember using
an LSE value instead of country to make it unique.
(LSE an exchange identifier)

2) Just for clarification, one sedol could be used
for many exchanges and many countries, not necessarily
just one country.

3) I also remember that the first digit used to be
a regional code i.e. 1=europe 2=asia 3=latin ete...
(something like that) is this true and does it
still hold somewhat true? And is there a rational
breakdown for the SEDOL? i.e. first 6 digits of a
cusip = the company or issuer the next 2 = the stock
and the last is the checkdigit.

p.s. could you also send me the checkdigit logic
Thanks
Gary C.