** Shares of Red Hill Minerals RHI.AX rise as much as 10.8% to A$4.400, their highest since Aug. 19

** Gold explorer declares a special dividend of A$0.30 per share

** Co last month reported annual net profit of A$153.5 mln vs a loss of A$2.3 mln YoY

** Stock posts its biggest intraday gain since Sept. 10

** Over 99,000 shares change hands, 10.9x the 30-day avg

** Stock currently up 7.2% YTD, including current session's moves, as of 0032 GMT

(Reporting by Kumar Tanishk in Bengaluru)

((Tanishk.Kumar@thomsonreuters.com;))