Rio Tinto, Glencore could save $500m by joining coal businesses

[caption id="attachment_801498" align="aligncenter" width="600"] Rio Tinto’s Mount Thorley Warkworth mine, in New South Wales Hunter Valley region.[/caption] Talks about Rio Tinto (LON:RIO) being a takeover target for Glencore (LON:GLEN) continue to be loud and strong, with analysts now saying the companies...