** Shares of Australia's Cauldron Energy CXU.AX rise as much as 87.5% to A$0.015; marking its best-ever intraday gain

** Stock at its highest since January 6

** Uranium explorer enters non-binding MoU with Uzbekistan's national uranium company, Navoiyuran, for further development of Yanrey Uranium Project in Western Australia

** Collaboration may include technical assistance in design and operations, future funding, support with government advocacy, and expertise in in-situ uranium recovery - CXU

** Around 40.3 mln shares change hands, nearly 15.9x 30-day average; busiest day since May 23

** CXU last up 37.5%, bringing YTD losses to 5.9%

(Reporting by Keshav Singh Chundawat in Bengaluru)

((Keshav.SinghChundawat@thomsonreuters.com ))