** Shares of New Zealand's Contact Energy CEN.NZ rise as
much as 5.1% to NZ$9.250, their highest since Jan. 25, 2021
** Stock posts its biggest intraday percentage gain since
Feb. 1, 2021
** Electricity generation co signs supply agreement with Rio
Tinto's RIO.AX New Zealand Aluminium Smelter (NZAS) for a
maximum of 20 years
** Fellow energy suppliers Meridian Energy MEL.NZ and
Mercury NZ MCY.NZ climb as much as 4.5% and 3.8%,
respectively, on signing similar agreements with NZAS
** CEN stock up 9.9% YTD, as of last close
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))