Australia's Qantas hits near 4-month low on ex-dividend trade

** Shares of Qantas Airways QAN.AX fall as much as 3% to A$8.76 in early trade, their lowest since May 22

** Stock logs largest intraday pct loss since mid-August

** Australia's flag carrier trades ex-dividend

** Co declared final dividend of 19.8 AU cents per share

** Stock down 23.8% YTD, including the day's moves