(MTLEX) As per the reports in the media, zinc and lead are expected to continue with robust margins in 2018, as supply for both these metals are expected to be constrained through the year, pushing the prices for these metals higher. Zinc is expected to stay in deficit in the first half of the year due to scheduled mine closures, strategic output cut by Glencore and environmental intervention in China. Lead supplies are also expected to remain in deficit through the year. Further, the demand for zinc is expected to increase by 2% this year, whereas the demand for lead is expected to increase by 2% to 2.5%