** Shares of Harvey Norman HVN.AX firm as much as 2.5% to
A$3.64, set for best day since Sept 1 - if gains hold
** Australia's top electronics retailer says it intends to
buy back up to 10% of its shares, valued at about A$442.3 mln
($280.11 mln)
** Says it expects to start buyback in November and complete
within 12 months
** Separately, co reports quarterly profit of A$86.2 mln vs
A$169.5 mln a year earlier
** Shares hit highest level since Oct 18
** Stock down ~12.2% this year, as of last close
($1 = 1.5790 Australian dollars)
(Reporting by Archishma Iyer in Bengaluru)
((Archishma.Iyer@thomsonreuters.com;))