PREVIEW-Weak prices, US tariffs to weigh on first-quarter results for India's Hindalco

** Analysts expect India's Hindalco Industries HALC.NS to report 24.7% Y/Y rise in Q1 consol net profit and 4.7% Y/Y increase in revenue - data compiled by LSEG

** Stock drops as much as 2.3% before trading nearly flat at 674.55 rupees

** Jefferies expects margins contraction for HALC on weak aluminium prices and because of U.S. tariff impact

** HALC's U.S. unit Novelis, which makes up 62% of hindalco's total revenue, reports lower Q1 net profit on higher scrap metal prices and tariffs

** Novelis headwinds to weigh on HALC's Q1 results, say Elara Securities analysts

** Avg rating of 27 analysts on HALC at "buy"; median PT is 738 rupees - data compiled by LSEG

** YTD, HALC gains 11% vs metals index's .NIFTYMET 4.2% climb