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After the study of

Translating Ticker Talk
Ticker symbol - Wikipedia, the free encyclopedia

I summarize the following about ticker symbols (please correct me, where I am wrong):

Ticker symbols are unique (mathematical unique) for one stock exchange at one point of time.
Ticker symbols may change over time. Old ticker symbols of delisted companies can be taken over by other companies at the exchange. The wikipedia article mentions the takeover of the ticker symbol V by Visa Card from the delisted Vivendi for instance.

Questions:
1. Are the ticker symbols of the NASDAQ and the NYSE all together unique at the moment, without referring the stock eschange?
2. Is there a list of ticker symbol changes, which is always updated?

<blockquote data-quote="Martin Thomson" data-source="post: 158779" data-attributes="member: 29698">After the study of <a href="http://www.investopedia.com/articles/basics/09/translating-ticker-talk.asp" target="_blank">Translating Ticker Talk</a><a href="https://en.wikipedia.org/wiki/Ticker_symbol" target="_blank">Ticker symbol - Wikipedia, the free encyclopedia</a>I summarize the following about ticker symbols (please correct me, where I am wrong):Ticker symbols are unique (mathematical unique) for one stock exchange at one point of time.Ticker symbols may change over time. Old ticker symbols of delisted companies can be taken over by other companies at the exchange. The wikipedia article mentions the takeover of the ticker symbol V by Visa Card from the delisted Vivendi for instance.Questions:1. Are the ticker symbols of the NASDAQ and the NYSE all together unique at the moment, without referring the stock eschange?2. Is there a list of ticker symbol changes, which is always updated?</blockquote>

[QUOTE="Martin Thomson, post: 158779, member: 29698"] After the study of [URL="http://www.investopedia.com/articles/basics/09/translating-ticker-talk.asp"]Translating Ticker Talk[/URL] [URL="https://en.wikipedia.org/wiki/Ticker_symbol"]Ticker symbol - Wikipedia, the free encyclopedia[/URL] I summarize the following about ticker symbols (please correct me, where I am wrong): Ticker symbols are unique (mathematical unique) for one stock exchange at one point of time. Ticker symbols may change over time. Old ticker symbols of delisted companies can be taken over by other companies at the exchange. The wikipedia article mentions the takeover of the ticker symbol V by Visa Card from the delisted Vivendi for instance. Questions: 1. Are the ticker symbols of the NASDAQ and the NYSE all together unique at the moment, without referring the stock eschange? 2. Is there a list of ticker symbol changes, which is always updated? [/QUOTE]

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