** Shares of Namoi Cotton NAM.AX fall as much as 7.2% to
A$0.645, their lowest level since May 1
** Stock on track for their worst day since May 16, if
losses hold
** Australia's competition regulator raises competition
concerns over Singapore's Olam Agri's IPO-OLAA.SI A$144.9
mln($96.68 mln) takeover offer for Namoi
** Regulator says proposed acquisition will reduce number of
competing ginning suppliers in lower Namoi Valley in New South
Wales
** Regulator says possibility of reduced competition could
result in higher prices for cotton growers in the region
** About 385,661 shares change hands, compared with 30-day
average trading volume of 259,756 shares
** Stock up 44.8% YTD, as of last close
($1 = 1.4988 Australian dollars)
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))