Business Smelting constraints make zinc's price plunge look overdone Updated : July 17, 2018 07:59 PM IST Prices of the metal, which is used to galvanise steel, have underperformed other LME metals this year. Stocks of zinc in LME approved warehouses, which now stand at 239,625 tonnes, are down 60 percent since September 2015 when Glencore slashed 500,000 tonnes of annual zinc production. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.