One of our posters, Danzar, has given links to the relevant info you may wish to read prior to investing in CGM.
https://hotcopper.com.au/threads/new-to-cgm-some-reading.3635391/page-2?get_post=true#.WaCzkbpuJ9A
https://hotcopper.com.au/threads/new-to-cgm-some-reading.3635391/page-3?get_post=true
usc75 posted this too. A recent summary of the current state of affairs.
https://hotcopper.com.au/threads/sp-rockets-67.2852655/page-149?post_id=26775729#.WaC0hLpuJ9A
Cheers to all current and future investors. E.