Currently, you can only delete one ticker symbol at a time.
To delete a ticker symbol:
Click Manage
from the Navigation bar and then click Local
Companies at left.
Result: The My Local Companies page
appears.
Click the Delete icon 
next to the ticker symbol name. Ticker symbols
without beside them indicate that they were added by someone else in
your organization; you are not allowed to delete ticker symbols that you
did not add.
When the warning message appears, click OK
to delete the ticker symbol.
Result: The ticker symbol is removed from the Available
Tickers section and the number of ticker symbols saved by your
organization is updated.
