"...Grupo Mexico said that Americas Mining the holding company of the mining division that includes Southern Copper and Asarco could list separate securities in capital markets. It did not give details about what kinds of securities AMC could offer, noting this is one of the strategic alternatives AMC is considering.
Banamex said that floating AMC shares would allow Grupo Mexico to raise capital. ....Mr Muniz [CFO of Grupo Mexico] said that Asarco's results were promising and that the mines in Arizona would be able to increase copper output to 280,000 tonnes by 2016...."
http://www.steelguru.com/metals_news/Grupo_Mexico_scraps_plan_for_mining_unit_merger/233777.html