Hindustan Zinc (HZL) reported a healthy Q4FY19 performance. For the quarter, better-than-expected sales volume of zinc and silver vertical aided the overall performance. Zinc sales volume came in at ~177000 tonnes (our estimate: 170000 tonnes), Lead sales volume came in at ~52000 tonnes (our estimate: 55000 tonnes) while silver sales volume came in at ~199000 kg (our estimate: 189000 kg). Topline came in at | 5491 crore (higher than our estimate of | 5220.3 crore). EBITDA came in at | 2789 crore (higher than our estimate of | 2647.2 crore). EBITDA margin came in at 50.8%( our estimate:...