** Shares of Mercury NZ MCY.NZ fall as much as 1.2% to NZ$5.71, hit lowest level since April 9

** The renewable electricity provider revises its FY2025 EBITDAF forecast to NZ$760 million ($448.48 million) from NZ$820 million

** Downgrade in FY25 EBITDAF outlook due to expected decrease in full-year hydro generation owing to continued dry weather in the Taupō catchment, adds co

** Stock last down 0.9%, with 1.2% losses this year as of last close

($1 = 1.6946 New Zealand dollars)

(Reporting by Sherin Sunny in Bengaluru)

((Sherin.Sunny@thomsonreuters.com))