** Shares of Australia's Magellan Financial MFG.AX fall
4.1% to A$11.9
** Stock set for weakest trading session since early Dec
** Says veteran Gerald Stack is stepping down from the asset
management firm after 18 years of running its crucial
infrastructure business
** Stack ran A$16.6 bln ($10.35 bln) infrastructure unit and
retained funds and flows despite the rocky global equities
business
** Infrastructure accounts for 41% of Magellan's A$38.6 bln
of funds under management
** The move comes along with MFG's global portfolio manager
Nikki Thomas moving from global equities to investment strategy
** Stock up 7% YTD
($1 = 1.6036 Australian dollars)
(Reporting by Rishav Chatterjee in Bengaluru)
((Rishav.Chatterjee@thomsonreuters.com;))