BUZZ-Australia's Alumina jumps on $2.2 bln buyout offer from Alcoa

** Shares of Alumina Ltd AWC.AX jump as much as 8.8% to A$1.110, posting their biggest intraday pct gain since Jan 10 ** Alumina producer receives non-binding, conditional buyout offer from U.S. aluminium producer Alcoa AA.N , valuing the co at $2.2 bln ** Under the offer, AWC shareholders to receive 0.02854 shares of Alcoa common stock for each share held ** AWC shares hit their highest level since Feb 19 ** About 9.6 mln shares change hands vs the 30-day avg of 9.0 mln shares ** AWC up 12.7% YTD, as of last close (Reporting by Echha Jain in Bengaluru) (([email protected]))