Australian gold stocks rise 4% on surging bullion prices
** Australian gold stocks .AXGD rise as much as 4.2%, logging their biggest intraday pct gain since August 20
** Sub-index tracks gold prices, which climbed more than 1% on Thursday supported by a weaker dollar and lower US Treasury yields GOL/
** Evolution Mining EVN.AX rises 3%, while Northern Star Resources NST.AX gains over 3%
** AXGD down nearly 4% this year, including the day's move