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