** Australian gold sub-index .AXGD falls as much as 7%, hitting its lowest level since February 23
** Sub-index set for worst intraday trading session since February 2, extending losses for second straight session
** Bullion prices slipped 3.6% on Tuesday, weighed by a stronger dollar and dimming prospects for rate cuts from the U.S. Federal Reserve GOL/
** Aussie gold miners Northern Star Resources NST.AX and Evolution Mining EVN.AX both fall over 5%
** YTD, sub-index up ~11.3%, including the day's moves
(Reporting by Shivangi Lahiri in Bengaluru)
((shivangi.lahiri@thomsonreuters.com))