Mumbai, Dec. 18 -- Hero MotoCorp Ltd dropped for a fifth straight session today. The stock is quoting at Rs 5749.5, down 1.16% on the day as on 13:19 IST on the NSE. The benchmark NIFTY is up around 0.19% on the day, quoting at 25867.9. The Sensex is at 84634.63, up 0.09%.Hero MotoCorp Ltd has lost around 2.16% in last one month.Meanwhile, Nifty Auto index of which Hero MotoCorp Ltd is a constituent, has eased around 0.39% in last one month and is currently quoting at 27489.25, down 0.59% on the day. The volume in the stock stood at 8.17 lakh shares today, compared to the daily average of 7.5 lakh shares in last one month. The benchmark December futures contract for the stock is quoting at Rs 5746.5, down 1.39% on the day. Hero MotoCorp L...