They're generally unique within a country but not between countries. Eg "Intrepid Mines trades in Canada on the TSX as IAU whereas in the US, IAU is the iShares

They're generally unique within a country but not between countries. Eg "Intrepid Mines trades in Canada on the TSX as IAU whereas in the US, IAU is the iShares gold trust ETF" [0] [0] https://www.quora.com/Can-2-publicly-traded-companies-have-the-same-ticker-symbol-across-the-worlds-various-exchanges https://www.quora.com/Can-2-publicly-traded-companies-have-t...