** Shares of Australia's Regis Resources RRL.AX fall as much as 4.9% to A$4.89, its biggest percent loss since August 22

** Gold explorer trades ex-dividend; pays final dividend of 5 Australian cents per share

** RRL last down 1.6%, paring YTD gains to 98.4%

(Reporting by Keshav Singh Chundawat in Bengaluru)

((Keshav.SinghChundawat@thomsonreuters.com))