** Australian gold stocks .AXGD rise as much as 6.6% to 17,763 points, highest since March 16
** Gold rose overnight because of some increased optimism about de-escalation in Middle East and as U.S. dollar weakened GOL/
** Sub-index on track for three straight weeks of gains; set for its best day since March 25
** Resolute Mining RSG.AX, Evolution Mining EVN.AX gain as much as 5.9% and 1%, respectively
** YTD, AXGD down 6%
(Reporting by Roushni Nair in Bengaluru)
((Roushni.nair@thomsonreuters.com))