Ero Copper is trading 5.13% lower at $36.47 in pre-market on October 6, with no confirmed company-specific announcement explaining the decline. - Supplied price context compares the move with the October 5 close of $38.44. - Recent coverage said copper had risen above $6.5 per pound on October 5, but that news does not clearly explain the decline. - Major US indices were modestly higher pre-market, with no direct sector or macro catalyst established.