** Shares of RareX Limited REE.AX rise as much as 10% to
A$0.033, on track for their best day since March 30, if gains
hold
** The rare-earths firm signs memorandum of understanding
(MOU) with fertilizer co Nitron
** Says MOU for Stage 1 and Stage 2 production from co's
Cummins Range Rare Earths & Phosphate project in Western
Australia
** Co's shares hit highest level since Oct 9
** About 1.3 mln shares change hands, compared with 30-day
average trading volume of 458,322 shares
** RareX stock down 44.4% YTD, as of last close
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))