noob option question

  1. 510 Posts.
    So i'm new in options - not in stocks, and I use Comsec for my trading.
    In terms of options, I remember people speaking about certain options on these boards (for example TOXO) but I cannot find these on the Comsec listing - nor on asx listing.
    So where would these be traded and how can they be traded ?
    Thanks
 
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