Bond dispute blocks Lynas on $390m Mt Weld project; AWB shares dive after profit halved; BHP in chase for Rio assets; Write-downs push Challenger to 10-year low; Barnett in stand-off with BHP

Bond dispute blocks Lynas on $390m Mt Weld project; AWB shares dive after profit halved; BHP in chase for Rio assets; Write-downs push Challenger to 10-year low; Barnett in stand-off with BHP