** Shares of Regal Partners RPL.AX advance as much as 3.6% to A$3.025, post their biggest intraday pct gain since January 22
** Investment manager approveson-market share buyback of up to A$75 million ($52.52 million) in ordinary stock
** Programme slated to begin on or after February 25 and will run for up to 12 months
** Co says buyback decision underscores balance-sheet strength
** Stock down 6.2% YTD
($1 = 1.4282 Australian dollars)
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com; X: @thatstanishk http://www.x.com/thatstanishk;))