Australian miners hit near 3-month low on falling copper, iron prices
** Australian mining stocks .AXMM slide as much as 3.6%, logging their lowest level since July 21
** Sub-index sees biggest intraday pct fall since September 11
** AXMM on course for third consecutive session of declines, if current trend holds
** Miners fall on the back of falling copper and iron ore prices MET/L IRONORE/
** Mining giants BHP Group BHP.AX and Rio Tinto RIO.AX down 3.8% and 4.2%, respectively
** Sub-index up 5.9% YTD