RE: [amibroker] Ticker Symbol Mismatch between yahoo and edgar - ZVXI or ZVX

Fri, 14 Apr 2006 07:36:08 -0700

Can you point out where on the web you found this information.
   Either
       the history of the symbol and its company ownerships
       the history of a company and its symbol history.
 
I am trying to see if my automated scripts can scrape this information of the web.
 
Thx,
Sarvi

From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Richard Dale
Sent: Thursday, April 13, 2006 9:31 PM
To: [email protected]
Subject: RE: [amibroker] Ticker Symbol Mismatch between yahoo and edgar - ZVXI or ZVX

Note that Zevex was listed on the AMEX as ZVX in May 1997, but converted to a NASDAQ as ZVXI listing in November 1998.
 
There are security identification systems such as CUSIP, ISIN and SEDOL but these involve additional licensing and are also not global (they have shortcomings when it comes to fungible securities too).
 
So, you can do it reliably but it will cost lots of money in licensing fees which aren't really feasible for an individual trader.
 
You should be request that Edgar have the correct code on their systems - especially if you're paying for such data.  If it's free - well, you get what you pay for when it comes to securities data.
 
Best regards,
Richard Dale.
Norgate Investor Services
- Premium quality Stock, Futures and Foreign Exchange Data for
  markets in Australia, Asia, Canada, Europe, UK & USA -
www.premiumdata.net
 

From: Shanmugham, Saravanan [mailto:[EMAIL PROTECTED]
Sent: Friday, 14 April 2006 4:44 AM
To: [email protected]
Subject: [amibroker] Ticker Symbol Mismatch between yahoo and edgar - ZVXI or ZVX

 
Hi,
     When writing my automated scripts to download EDGAR filing information for stocks in Amibroker,
I ran into a problem. Yahoo seems to refer to ZEVEX International as ZVXI, while EDGAR seems to be refering to it as a ZVX.
 
And I realize this problem not unique. Because I have a script which went to edgar to scrap ticker symbol to EDGAR company Name and CIK mapping information. I understan a symbol some times maps to multiple company names(possibly because they changed over time, or ticker symbol got reassiged when they get freed due to bankruptcy or acquisition).
When the script was done, I realized that the mapping database had only 4000 symbols mapped to one or moe company names, while my total ticker symbol list exported from amibroker for the entire US symbol list is around 7000.
 
So I suspect what I found happenning for ZVXI is also happennning for other symbols as well(I don't have a specific list, but close to 300 of them).
 
My understanding so far has been that each company has a single unique ticker symbol ad unique CIK.  Of which ticker symbols can change hands, but the CIK remains across the life of the company.
 
Is that not the case?
 
How can I find out all the alternative ticker symbols, if any, currently associated with a listed company.
 
Or in other words, how do I resolve this issue. I want to be able reliablly map from a Ticker Symbol to a CIK or company name string so that can scrap fundamental data from the EDGAR.
 
thanks,
Sarvi
 
-----------------------------------------------------------------------------------
Sarvi Shanmugham
Technical Leader
Cisco Systems Inc.
Phone: 408-902-3875
 

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