** Australian mining stocks .AXMM rise as much as 2%, making them among the top gainers in the broader benchmark .AXJO, which is down 0.6%
** Sub-index on track for third straight day of gains, if trends sustain
** Copper prices edged to a three-month high on the back of fund buying due to supply issues, shrugging off worries of a lack of progress to the end of the Iran war MET/L
** BHP BHP.AX and Rio Tinto RIO.AX advance as much as 2.4% and 2%, respectively
** Both stocks notch record highs
** YTD, AXMM up 20.8%, including the day's moves, outpacing a 0.9% loss in the AXJO
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))