** Shares of Orica ORI.AX advance as much as ~2% to A$23.865, set for a third straight session of gains
** Morningstar lifts explosives maker's fair value estimate by 8% to A$20, citing improved working capital terms
** Orica on Thursday posted its strongest annual earnings in 13 years, driven by solid performance across segments
** However, research firm Morningstar says market is overly optimistic on earnings improvement, noting that while margins may rise, longer-term demand headwinds persist
** ORI up 42.9%, YTD
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com; X: @thatstanishk http://www.x.com/thatstanishk;))