James J. Angel, Ph.D., CFA Georgetown University Associate ... - SEC

NASDAQ to the AMEX or NYSE, it would have to change its ticker symbol to a shorter ticker symbol. Likewise, when a stock moved from the NYSE or AMEX to the NASDAQ, it had to adopt a longer four or five character ticker symbol. However, when stocks switched from the AMEX to the NYSE they usually kept their shorter ticker symbol. ................
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