Mumbai, Oct. 26 -- Hindustan Zinc Ltd dropped for a fifth straight session today. The stock is quoting at Rs 493.8, down 0.44% on the day as on 13:19 IST on the NSE. The benchmark NIFTY is up around 0.22% on the day, quoting at 22650.05. The Sensex is at 73281.69, up 0.22%.Hindustan Zinc Ltd has lost around 13.82% in last one month.Meanwhile, Nifty Metal index of which Hindustan Zinc Ltd is a constituent, has eased around 9.86% in last one month and is currently quoting at 11478.2, up 0.95% on the day. The volume in the stock stood at 15.12 lakh shares today, compared to the daily average of 34.57 lakh shares in last one month. The benchmark October futures contract for the stock is quoting at Rs 495.6, down 0.22% on the day. Hindustan Zi...