** Shares of American Rare Earths ARR.AX rise as much as
47.3% to A$0.405, posting their biggest intraday percentage gain
since Feb. 12
** Stock hits its highest level since Feb. 20
** Rare earths explorer says it received a non-binding
proposal from U.S.-based special purpose acquisition co (SPAC)
Papaya Growth Opportunity Corp I PPYA.O for its Halleck Creek
Rare Earth Project in Wyoming
** Adds share consideration under proposal of $400 mln
** Says proposal would have resulted in project being listed
as a separate entity on the NASDAQ Exchange
** ARR says it has declined to advance with the proposal at
this time
** About 2.6 mln shares change hands, compared with the
30-day average volume of around 1.4 mln
** Stock up 66.7% YTD, as of last close
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))