** Indian metal stocks .NIFTYMET slump 3.9% VS Nifty 50's .NSEI 1.3% drop
** Sub-index is top sectoral loser, with all 15 stocks in the red
** Losses led by aluminium miners NALCO NALU.NS and Hindalco HALC.NS
** NALU down 6.2%, HALC slumps 5.6% as they track drop in global aluminium prices MET/L
** Session's losses in HALC and NALU erase their weekly gains; HALC down 4.6% and NALU falls 3.2% for the week
** YTD, metals up 1.8% vs Nifty's ~11% drop
(Reporting by Kashish Tandon in Bengaluru)
((Kashish.tandon@thomsonreuters.com))