** Shares of Felix Gold FXG.AX drop as much as 15.7% to A$0.35, their lowest level since mid-September
** Stock set for its weakest trading session since October-end, if current trends hold
** Gold explorer to raise A$18 million ($11.96 million) through placement
** Offer price of A$0.36 per share represents a 13.3% discount, as of last trading close on Wednesday before it went on trading halt pending announcement
** Stock has risen more than 300% this year, including session's moves
($1 = 1.5056 Australian dollars)
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))