** Shares of Australia's Sandfire Resources SFR.AX fall as much as 2.1% to A$17.50, their lowest level since April 14
** The copper miner reports a fall in group equivalent production for the March quarter to 34.5 kilo tons, down from 36.1 kilo tons a year earlier, citing performance constraints from unusually high rainfall and unplanned maintenance
** Company retains its copper equivalent production outlook range of 149kt to 165kt for FY26, but said full-year volumes are forecast to be within the lower half of the range
** Broader mining index .AXMM up 0.3%
** Sandfire stock down 2%, YTD
(Reporting by Shruti Agarwal in Bengaluru)
((Shruti.Agarwal@thomsonreuters.com))