** Shares of Hallador Energy HNRG.O rise nearly 17.4% to about $23.5 premarket
** Terre Haute, Indiana-based electricity and coal producer on Monday reported Q3 revenue above Wall Street's estimates, helped by favorable summer weather, higher energy demand and strong natural gas prices
** Q3 revenue up 40% yoy to $146.8 mln, above analysts' average estimate of $110 mln - data compiled by LSEG
** Posted Q3 EPS of 56 cents, beating estimates of 8 cents
** Three of four brokerages rate the stock "buy" and one "hold"; their median PT is $23.5, data compiled by LSEG
** As of last close, shares up 74.8% YTD
(Reporting by Megavarshini G. Somasundaram in Bengaluru)
((Megavarshini.SomasundaramGnanasundari@thomsonreuters.com))