** Hindalco Industries HALC.NS shares jump more than 3% to 938.20 rupees vs 0.14% rise in Nifty Metal .NIFTYMET index
** J.P.Morgan expects limited financial impact of gas supply disruptions on aluminium extrusion
** HALC issued force majeure notice to customers after gas supply disruptions linked to Mideast conflict
** Brokerage estimates extrusion products account for about 19% of co's downstream aluminium capacity, says overall earnings impact could be less than 1%
** Notes co's upstream aluminium and copper smelting ops unaffected
** Trading volume at 6.33 mln shares so far vs 6.41 mln shares 30-day avg
** HALC rated "hold" on avg by 28 analysts, median PT 918 rupees - data compiled by LSEG
** YTD, stock up 2.6% vs sub-index's 1.3% rise
(Reporting by Surbhi Misra in Bengaluru)
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