** Brokerage Macquarie bullish on Australian copper-gold miner FireFly Metals FFM.AX after an updated mineral resource estimate (MRE)
** Co says MRE shows a 43% increase in contained copper at its Green Bay project
** Macquarie sees the larger resource supporting expanded mining project
** Says potentially doubling annual copper output to 60,000 metric tons, up from 32,000 tons
** Brokerage upgrades FFM price target on FireFly by 35% to A$2.30, citing valuation increases driven by the expanded base case
** Shares have added 83.78% year-to-date as of the last close
(Reporting by Roushni Nair in Bengaluru)
((Roushni.Nair@thomsonreuters.com))