** Shares of Rex Minerals RXM.AX fall as much as 19% to
A$0.203, their lowest since Dec 16
** The mineral explorer receives commitments to raise A$8
mln ($5.23 mln) via a placement at A$0.20 per share
** Issue price represents a 20% discount to stock's last
closing price on July 31
** More than 4.1 mln shares change hands, 10.7 times the
30-day average of 387,032 shares
** As of last close, stock up 8.7% this year
($1 = 1.5302 Australian dollars)
(Reporting by Himanshi Akhand in Bengaluru)
((Himanshi.Akhand@thomsonreuters.com;))