Sorry, S1234, to my knowledge CQT has NEVER been in the ASX200, or even in the ASX300. It WAS in the ALL ORDS until it was removed in March 2009, as per this news story about the last S&P rebalance:
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6 Mar 2009 S&P/ASX March quarterly index rebalance
ALL ORDINARIES
REMOVALS
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CQT Conquest Mining Limited
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